Saturday 4 April 2015

Know your Internet browser shortcuts

Internet browsersThere are dozens of different shortcut keys that can be used with Internet browsers. Below are a few of our top suggested Internet browser shortcuts.
  • Press Alt + D to move the cursor into theaddress bar.
  • Hold down the Ctrl key and press the + or -to increase and decrease the size of text. Ctrl + 0 will reset the text.
  • Press the backspace key or press Alt key + left arrow to go back a page.
  • Press F5 to refresh or reload a web page.
  • Press F11 to make the Internet browser screen full screen. Press F11 again to return to the normal view.
  • Press Ctrl + B to open your Internet bookmarks.
  • Press Ctrl + F to open the find box to search for text within the web page you are reading.

please provide your valuable suggestions and comments in comment box ,
By :Renjith Raj
mobile :919020809088
Watsapp: 919020809088

Friday 3 April 2015

How to detect and delete virus without any antivirus

How To Detect And Delete Virus Without Any Antivirus
People ask how my laptop has never been affected by any computer virus, even though I do not have any antivirus installed. I always say ‘if you know how thief is going to do his crime, you can stop him from doing it easily‘, same with virus. If you know how virus works and spread you can protect your system without any antivirus. Learn how to detect a virus and delete it without antivirus:
Most of the times these virus spread via external drives like your pen drives or external harddisk.

Always Disable Autorun

Autorun is a function of your operating system which makes your external drive able to do something when it is connected to your system. Virus creates a file on external drive named ‘autorun.inf’ and put instructions in this file to execute itself automatically when the drive is connected. When you connect your external drive, system take instruction from ‘autorun.inf’ on the drive and execute them. So virus gets executed and affect your system.
So disable the “autorun’ function. You can do it from ‘group policy option’ or from ‘registry’. Search ‘how to disable autorun using registry’ on google.
Or if you don’t want to disable it then you can hold shift key on your keyboard while you are connecting your external drive to your system. By holding shift the autorun.inf file on your external drive will not be automatically executed.

Show Hidden & System Files

Go to Control Panel -> Folder Options -> View tab. Uncheck “hide extension of file” option, means you should always know that what is the extension of file that you are accessing. Then check “show hidden files” option and uncheck “hide system files” option. Now a days most of the virus hide itself as hidden and system file, so you better not let them be Mr India on your system.
(This will help you if virus has not affected your system yet. if your system is already affected then maybe this option won’t work, I mean the folder options settings will be reset every time automatically.)

Check Whether Your System Is Infected

If your external drive is affected then probably there is a autorun.inf file looking like hidden and system file. Try to delete it normally. If its get deleted then it will be easy, and if not then go to its properties and uncheck hidden and read only, then open it in notepad and remove everything and save it, or just delete file.
If still not working or error occurred that ‘access denied or read only file’ then
Close file and start CMD (Press ‘Win’+’R’, type ‘cmd’, press enter).
Now go to your drive (suppose its ‘e’ then)
Type e: and press Enter
Now change the attribute of autorun.inf file by typing
attrib -h -s -r “autorun.inf”
(h for hidden, s for system and, r for read only)
Now you can delete it by typing
del “autorun.inf”
Or just open your drive and delete it. it will get deleted (in 99% case).
(u can use dir/ah command to find files)
Now delete all the suspicious file in drive, like ‘looking like a folder but with .exe extention’ or any suspicious file with size 67kb or 128kb or 2kb… any file which you found suspicious can be deleted after you delete autorun.inf file.

If Your System Is Already Affected

Well there is many thing you can do to make it good from worst.
So there are many kind of symptoms, like
  • cmd (not able to start)
  • task manager (not able to start
  • folder option (get reset every time)
  • registry (not able to start)
  • msconfig (not able to start)
  • Now what to do to make those work..
So here are some steps that you can try
  1. Start system in safe mode. (work in most cases)
  2. If safe mode isn’t working then try to use safe mode with cmd prompt.
  3. Create a new user and check in that new user account if cmd can be open or not.
  4. Always keep some software (like tune up utilities) from which you can check date of any service created. Use one of them and start cmd any how.
Now, after you are able to start them.
  • First start task manager(CTRL+SHIFT+ESCAPE) and end all suspicious services.
  • Then end explorer.exe also
  • From new task start msconfig.
  • In msconfig go to service tab and uncheck any suspicious or unwanted service.you can guess by manufacture or by thinking that did you have installed something related to that service or not.
  • Go to startup tab. check for service which look unknown or cross check with tune up ( on which date service is created) or any service that you can say its virus.
  • Check location of that service from where it is started, you can find location within startup tab under COMMAND.. it will show you the path of the file
  • Again open cmd..
  • Go to that location..
  • Change attribute of the file..( as i shown above)
  • DELETE it
  • Do it for every file that look like virus to you. Be care full, you will need some experience, because if you delete some important file then it can cause problem in related application.

Wednesday 1 April 2015

General cleaning Tips Of Computer

General cleaning Tips

Below is a listing of suggestions to follow when cleaning any computer components or peripherals as well as tips to help keep a computer clean.
  1. Never spray or squirt any liquid onto any computer component. If a spray is needed, spray the liquid onto a cloth.
  2. You can use a vacuum to suck up dirt, dust, or hair around the computer. However,do not use a vacuum inside your computer as it generates static electricity that can damage your computer. If you need to use a vacuum inside your computer, use a portable battery powered vacuum or try compressed air.
  3. When cleaning a component or the computer, turn it off before cleaning.
  4. Be cautious when using any cleaning solvents; some people have allergic reactions to chemicals in cleaning solvents and some solvents can even damage the case. Try always to use water or a highly diluted solvent.
  5. When cleaning, be careful to not accidentally adjust any knobs or controls. Also, when cleaning the back of the computer, if anything is connected make sure not to disconnect the plugs.
  6. When cleaning fans, especially smaller fans, hold the fan or place something in-between the fan blades to prevent it from spinning. Spraying compressed air into a fan or cleaning a fan with a vacuum may cause damage or generate back voltage.
  7. Never eat or drink around the computer.
  8. Limit smoking around the computer.

Cleaning tools

Although computer cleaning products are available you can also use household items to clean your computers and peripherals. Below is a listing of items you may need or want to use while cleaning your computer.
  • Cloth - A cotton cloth is the best tool used when rubbing down computer components. Paper towels can be used with most hardware, but we always recommend using a cloth whenever possible. However, only use a cloth when cleaning components such as the case, a drive, mouse, and keyboard. You should not use a cloth to clean any circuitry such as the RAM or motherboard.
  • Water or rubbing alcohol - When moistening a cloth, it is best to use water or rubbing alcohol. Other solvents may be bad for the plastics used with your computer.
  • Portable Vacuum - Sucking the dust, dirt, hair, cigarette particles, and other particles out of a computer can be one of the best methods of cleaning a computer. However, do not use a vacuum that plugs into the wall since it creates lots of static electricity that can damage your computer.
  • Cotton swabs - Cotton swaps moistened with rubbing alcohol or water are excellent tools for wiping hard to reach areas in your keyboard, mouse, and other locations.
  • Foam swabs - Whenever possible, it is better to use lint-free swabs such as foam swabs.

Case cleaning

Why? Keeps the appearance of the computer looking new. While cleaning, if you see ventilation slots, these can be cleaned or cleared to help keep a steady airflow into the computer and keep all components cool.
Procedure: The plastic case that houses the PC components can be cleaned with a slightly damp lint-free cloth. For stubborn stains, add a little household detergent to the cloth. You should not use a solvent cleaner on plastics.
Make sure all vents and air holes are hair and lint free by rubbing a cloth over the holes and vents. It is also helpful to take a vacuum around each of the hole, vents, and crevices on the computer. It is safe to use a standard vacuum when cleaning the outside vents of a computer.
If you are looking for steps on cleaning the inside of the computer, see themotherboard cleaning section.

CD-ROM, DVD, and other disc drive cleaning

Why? A dirty CD-ROM drive or other disc drives can cause read errors when reading discs. These read errors could cause software installation issues or issues while running the program.
Procedure: To clean the CD-ROM drive we recommend purchasing a CD-ROM cleaner from your local retailer such as a local Radio Shack or other computer retailer. Using a CD-ROM cleaner should sufficiently clean the CD-ROM laser from dust, dirt, and hair.
In addition to cleaning the drive with a special disc designed to clean drives, you can also use a cloth dampened with water to clean the tray that ejects from the drive. However, make sure that after the tray is cleaned that it completely dry before putting the tray back into the drive.
See the CD disc cleaning recommendation for further steps on cleaning each of your CDs.

CD and DVD disc cleaning

Why? Dirty CDs can cause read errors or cause CDs to not work at all.
Procedure: Use a cleaning kit or damp clean cotton cloth to clean CDs, DVDs, and other discs When cleaning a disc wipe against the tracks, starting from the middle of the CD or DVD and wiping towards the outer side as shown in the picture below. Never wipe with the tracks; doing so may put more scratches on the disc.
Cleaning a CD and DVD disc
Tip: If the substance on a CD cannot be removed using water, pure alcohol can also be used.

Hard drive cleaning

Why? Hard drives cannot be physically cleaned, however, they can be cleaned with software utilities to help it run fast and efficiently. Utilizing these utilities prevent the hard drive from slowing down.
Procedure: Refer to our basic troubleshooting section for your operating system for steps that can be done to help improve the performance of your computer.

Headphones cleaning

Why? Headphones used by many different people may need to be frequently cleaned to help prevent the spreading of germs and head lice.
Procedure: If the headphones being used are plastic or vinyl, moisten a cloth with warm water and rub the head and earpieces of the headphones. If the headphones are being used for a library or school do not use any disinfectant or cleaning solvent since some people can have allergic reactions to the chemicals they contain.
Headphones that have cushions also have the availability of having the cushions replaced. Replacing these cushions can also help keep the headphones clean.
Finally, in regards to headphones spreading head lice. If many different students use the same headphones, consider having the students using their own headphones, placing bags over the headphones, or using headphones that can be wiped with warm water after each use.

Keyboard cleaning

These steps are for cleaning a desktop keyboard. See the cleaning a laptop keyboard page for laptop steps.
Dust, dirt, and bacteria
Dirt and hair under a keyboard keyThe computer keyboard is usually the most germ infected items in your home or office, it may even contain more bacteria than your toilet seat. Cleaning it helps remove any dangerous bacteria and keeps the keyboard working properly.
Procedure: Before cleaning the keyboard first turn off the computer or if you are using a USB keyboard unplug it. Not unplugging the keyboard can cause other computer problems as you may press keys that cause the computer to perform a task you do not want it to do.
Many people clean the keyboard by turning it upside down and shaking. A more efficient method is to use compressed air. Compressed air is pressurized air contained in a can with a very long nozzle. aim the air between the keys and blow away all of the dust and debris that has gathered there. A vacuum cleaner can also be used, but make sure the keyboard does not have loose "pop off" keys can be sucked up by the vacuum.
If you want to clean the keyboard more extensively remove the keys from the keyboard.
After the dust, dirt, and hair has been removed. Spray a disinfectant onto a cloth or use disinfectant cloths and rub each of the keys on the keyboard. As mentioned in our general cleaning tips, never spray any liquid onto the keyboard.
Substance spilt into the keyboard
If the keyboard has anything spilt into it (e.g. pop, cola, Pepsi, Coke, beer, wine, coffee, and milk), not taking the proper steps can destroy the keyboard.
Procedure: Below are a few recommendations that can help prevent a keyboard from becoming bad after something has spilt into the keys.
If anything is spilt onto the keyboard turn the computer off immediately or at the very least disconnect the keyboard from the computer. Once done flip the keyboard over to prevent the substance from penetrating circuits. While the keyboard is upside down, shake the keyboard over a surface that can be cleaned later. While still upside down, use a cloth to start cleaning the keys. After cleaned leave the keyboard upside down for at least one night allowing it to dry. Once dry, continue cleaning the keyboard with any remaining substance.
If after cleaning the keyboard you have keys that stick remove the keys and clean below the keys and the bottom portion of the key.
Finally, if the keyboard still works but remains dirty or sticky before discarding the keyboard as a last resort try washing the keyboard in the dishwasher.
If after doing all the above steps the keyboard still does not work we recommendbuying a new keyboard.

LCD cleaning

Why? Dirt, dust, and fingerprints can cause the computer screen to be difficult to read.
Procedure: Unlike a computer monitor, the LCD or flat-panel display is not glass and requires special cleaning procedures.
When cleaning the LCD screen it is important to remember to not spray any liquids onto the LCD directly, press gently while cleaning, and do not use a paper towel since it scratches the LCD.
To clean the LCD screen use a non-rugged microfiber cloth, soft cotton cloth, or Swiffer duster. If a dry cloth does not completely clean the screen, you can apply rubbing alcohol to the cloth and wipe the screen with a damp cloth. Rubbing alcohol is used to clean the LCD before it leaves the factory.

Monitor cleaning

Tip: This section is for computer monitors if you have an LCD or flat-panel see the LCD cleaning section.
Why? Dirt, dust, and fingerprints can cause the computer screen to be difficult to read.
Procedure: A glass monitor screen can be cleaned with ordinary household glass cleaner. Be sure to remove power from the monitor and spray the cleaner onto a lint free-cloth so the fluid does not leak into the electrical components inside the monitor. Vacuum off any dust that has settled on top of the monitor, and make sure no books or papers are covering the air vents. Obstructed monitor vents can cause the monitor to overheat or even catch on fire.
Caution: We suggest only using a cloth dampened with water when cleaning non-glass monitors or any anti-glare screens. Using ordinary household glass cleaner on special screens, especially cleaners with ammonia can remove anti-glare protection or other special surfaces.
Other good cleaning solutions
  • Microfiber Towels
  • Swiffer Dusters
Related pages

Motherboard cleaning

Why? Dust and especially particles of cigarette smoke can build up and corrode circuitry causing various problems such as computer lockups
Caution: When inside the computer take the necessary ESD precautions and try to avoid unplugging any cables or other connections.
Procedure: Our recommendation when cleaning the motherboard from dust, dirt, or hair is to use compressed air. When using compressed air, hold it in the up-right position to prevent any of the chemicals from coming out of the container, which may damage or corrode the Motherboard or other components. Also, ensure when using compressed air that you always blow the dust or dirt away from the motherboard, or out of the case.
Another good alternative to compressed air is to use a portable battery powered vacuum that can effectively remove the dust, dirt, and hair from the motherboard completely and prevent it from getting trapped within the case. However, do not use a standard electricity powered vacuum as it can cause lots of static electricity that can damage the computer. When using a vacuum keep it a couple inches away from the motherboard and all other components to prevent damage and anything from being sucked into the vacuum (e.g. jumpers or small cables).
Tip: When cleaning the inside of the case also look at any fans or heat sinks. Dust, dirt, and hair collects around these components the most.

Mouse cleaning

Why? A dirty optical-mechanical mouse (mouse with a ball) can cause the mouse to be difficult to move as well as cause strange mouse movement.
Procedure: To clean the rollers of an optical-mechanical mouse, you must first remove the bottom cover of the mouse. To do this, examine the bottom of the mouse to see what direction to rotate the cover. As you can see in the below illustration, the mouse cover must be moved counter clockwise. Place two fingers on the mouse cover and push the direction of the arrows.
Rotate bottom of mouse cover
Computer mouse with ball removedOnce the cover has rotated about an inch, rotate the mouse into its normal position, covering the bottom of the mouse with one hand and the bottom should fall off including the mouse ball. If the cover does not fall off try shaking the mouse gently.
Once the bottom cover and the ball is removed, you should be able to see three rollers located within the mouse. Use a cotton swab, finger, or fingernail to remove any substance. Usually, there is a small line of hair and dirt in the middle of the roller, remove as much as this substance as possible.
Once you have removed as much dirt and hair as possible, set the ball back within the mouse and place the cover back on.
If the mouse still has the same problems repeat the above process. If after several attempts the mouse is still having the same problems your mouse has other hardware issues and should be replaced.
Note: Cleaning your mouse pad with a damp cloth can also help improve a computer's mouse movement.
Why? To help keep the mouse clean and germ free it can be helpful to clean the mouse.
Procedure: Use a cloth moistened with rubbing alcohol or warm water and rub the surface of the mouse and each of its buttons.

Printer cleaning

Why? Cleaning the outside of a printer can help keep the printer's appearance looking good and if used by many different people keep the printer clean of germs.
Procedure: First, make sure to turn off the printer before cleaning it. Dampen a cloth with water or rubbing alcohol and wipe the case and each of the buttons or knobs on the printer. As mentioned earlier, never spray any liquid directly onto the printer.
Why? Some printers require the inside to be cleaned to help keep the printer running smoothly.

Scanner cleaning

Why? Flatbed scanners commonly become dirty with dust, fingerprints, and hair. When the scanner is dirty, the images may have distortions.
Procedure: Clean a flatbed scanner's surface by spraying a window cleaner onto a paper towel or cotton cloth and wipe the glass until clean. As mentioned earlier, never spray a liquid directly onto the component.
The same towel or cotton cloth can also be used to clean the outside of the scanner.

Miscellaneous cleaning steps

Below are a listing of miscellaneous computer hardware that is rarely used today, but kept on this page people working on older computers and need to clean these devices.
Floppy drive cleaning
Why? Dirty read/write heads on the floppy drive can cause errors during the reading or writing process.
Procedures: The floppy drive can be cleaned two different ways. The first method of cleaning a floppy drive is to purchase a kit at your local retail store designed to clean the read/write heads on your floppy drive.
The second method of cleaning the floppy drive is only recommended for experienced computer users. Open the floppy drive casing and physically swab the read/write heads with a lint-free foam swab soaked in pure alcohol, free-on, or trichloroethane. When performing these steps, be extremely careful when cleaning the heads to ensure that you do not lock them out of alignment causing the floppy drive to not work. To help prevent the heads from becoming out of alignment, use a dabbing motion lightly putting the swab on the head and removing it, do not perform a side-to-side motion with the swab.
Palm pilot cleaning
Why? Dirty touch screens can cause difficult navigation.
Procedure: To clean the Palm Pilot Screen, use a soft cloth moistened with rubbing alcohol and rub the screen and the casing of the palm pilot. It is not recommended to use glass cleaner as it could damage plastics over time.
SuperDisk and LS120 cleaning
Why? Cleaning the SuperDisk and LS120 prevents the drive heads from becoming dirty.
Procedure: Purchase the SuperDisk cleaning kit available through Imation. Using any other method voids the warranty on your drive.

Monday 30 March 2015

156 useful Run Commands

To Access…Run Command
Accessibility Controls access.cpl
Accessibility Wizardaccwiz
Add Hardware Wizardhdwwiz.cpl
Add/Remove Programs appwiz.cpl
Administrative Toolscontrol admintools
Adobe Acrobat (if installed)acrobat
Adobe Designer (if installed)formdesigner
Adobe Distiller (if installed)acrodist
Adobe ImageReady (if installed)imageready
Adobe Photoshop (if installed)photoshop
Automatic Updateswuaucpl.cpl
Bluetooth Transfer Wizardfsquirt
Calculatorcalc
Certificate Managercertmgr.msc
Character Mapcharmap
Check Disk Utilitychkdsk
Clipboard Viewerclipbrd
Command Promptcmd
Component Servicesdcomcnfg
Computer Managementcompmgmt.msc
Control Panelcontrol
Date and Time Properties timedate.cpl
DDE Shares ddeshare
Device Managerdevmgmt.msc
Direct X Control Panel (if installed)*directx.cpl
Direct X Troubleshooterdxdiag
Disk Cleanup Utilitycleanmgr
Disk Defragmentdfrg.msc
Disk Managementdiskmgmt.msc
Disk Partition Managerdiskpart
Display Propertiescontrol desktop
Display Propertiesdesk.cpl
Display Properties (w/Appearance Tab Preselected)control color
Dr. Watson System Troubleshooting Utilitydrwtsn32
Driver Verifier Utilityverifier
Event Viewereventvwr.msc
Files and Settings Transfer Toolmigwiz
File Signature Verification Toolsigverif
Findfastfindfast.cpl
Firefox (if installed) firefox
Folders Propertiesfolders
Fontscontrol fonts
Fonts Folderfonts
Free Cell Card Gamefreecell
Game Controllers joy.cpl
Group Policy Editor (XP Prof)gpedit.msc
Hearts Card Gamemshearts
Help and Supporthelpctr
HyperTerminalhypertrm
Iexpress Wizardiexpress
Indexing Serviceciadv.msc
Internet Connection Wizardicwconn1
Internet Exploreriexplore
Internet Properties inetcpl.cpl
Internet Setup Wizardinetwiz
IP Configuration (Display Connection Configuration)ipconfig /all
IP Configuration (Display DNS Cache Contents)ipconfig /displaydns
IP Configuration (Delete DNS Cache Contents)ipconfig /flushdns
IP Configuration (Release All Connections)ipconfig /release
IP Configuration (Renew All Connections)ipconfig /renew
IP Configuration (Refreshes DHCP & Re-Registers DNS)ipconfig /registerdns
IP Configuration (Display DHCP Class ID)ipconfig /showclassid
IP Configuration (Modifies DHCP Class ID)ipconfig /setclassid
Java Control Panel (if installed)jpicpl32.cpl
Java Control Panel (if installed)javaws
Keyboard Propertiescontrol keyboard
Local Security Settingssecpol.msc
Local Users and Groupslusrmgr.msc
Logs You Out Of Windows logoff
Malicious Software Removal Tool mrt
Microsoft Access (if installed)msaccess
Microsoft Chatwinchat
Microsoft Excel (if installed)excel
Microsoft Frontpage (if installed)frontpg
Microsoft Movie Makermoviemk
Microsoft Paintmspaint
Microsoft Powerpoint (if installed)powerpnt
Microsoft Word (if installed)winword
Microsoft Syncronization Toolmobsync
Minesweeper Gamewinmine
Mouse Propertiescontrol mouse
Mouse Propertiesmain.cpl
Nero (if installed)nero
Netmeeting conf
Network Connectionscontrol netconnections
Network Connectionsncpa.cpl
Network Setup Wizardnetsetup.cpl
Notepadnotepad
Nview Desktop Manager (if installed)nvtuicpl.cpl
Object Packagerpackager
ODBC Data Source Administratorodbccp32.cpl
On Screen Keyboardosk
Opens AC3 Filter (if installed)ac3filter.cpl
Outlook Expressmsimn
Paintpbrush
Password Propertiespassword.cpl
Performance Monitorperfmon.msc
Performance Monitorperfmon
Phone and Modem Options telephon.cpl
Phone Dialerdialer
Pinball Gamepinball
Power Configuration powercfg.cpl
Printers and Faxescontrol printers
Printers Folderprinters
Private Character Editoreudcedit
Quicktime (If Installed)QuickTime.cpl
Quicktime Player (if installed)quicktimeplayer
Real Player (if installed)realplay
Regional Settings intl.cpl
Registry Editorregedit
Registry Editorregedit32
Remote Access Phonebookrasphone
Remote Desktop mstsc
Removable Storagentmsmgr.msc
Removable Storage Operator Requestsntmsoprq.msc
Resultant Set of Policy (XP Prof)rsop.msc
Scanners and Camerassticpl.cpl
Scheduled Taskscontrol schedtasks
Security Center wscui.cpl
Servicesservices.msc
Shared Foldersfsmgmt.msc
Shuts Down Windowsshutdown
Sounds and Audio mmsys.cpl
Spider Solitare Card Gamespider
SQL Client Configuration cliconfg
System Configuration Editorsysedit
System Configuration Utilitymsconfig
System File Checker Utility (Scan Immediately)sfc /scannow
System File Checker Utility (Scan Once At The Next Boot)sfc /scanonce
System File Checker Utility (Scan On Every Boot)sfc /scanboot
System File Checker Utility (Return Scan Setting To Default)sfc /revert
System File Checker Utility (Purge File Cache)sfc /purgecache
System File Checker Utility (Sets Cache Size to size x)sfc /cachesize=x
System Informationmsinfo32
System Properties sysdm.cpl
Task Managertaskmgr
TCP Testertcptest
Telnet Clienttelnet
Tweak UI (if installed)tweakui
User Account Managementnusrmgr.cpl
Utility Managerutilman
Windows Address Bookwab
Windows Address Book Import Utilitywabmig
Windows Backup Utility (if installed)ntbackup
Windows Explorerexplorer
Windows Firewallfirewall.cpl
Windows Magnifier magnify
Windows Management Infrastructurewmimgmt.msc
Windows Media Playerwmplayer
Windows Messengermsmsgs
Windows Picture Import Wizard (need camera connected)wiaacmgr
Windows System Security Toolsyskey
Windows Update Launcheswupdmgr
Windows Version (to show which version of windows)winver
Windows XP Tour Wizardtourstart
Wordpad write