Step 1:First you need to backup all your important files(Documents, photos, Videos, music). Now a days most of us do have pen drive, external HDD or any other external drives that we can store data. So, save your important data to an external drive. But, before you do that you must first scan the drive it contents virus or not.This is because after you remove virus from your PC if your drive content any virus and if you connect it to your PC again your PC will get infected again.(If possible format your external drive and then store your data)
Step 2:To remove a virus first you need to stop its process. So, the virus will not work and able to do any process.Always keep that in mind if you want to remove a virus first you need to stop its process otherwise you will not able to stop it.Therefore to do this, restart or reboot your Computer in safe mode. Now you must be thinking why in safe mode? well the answer is simple when you run your computer in safe mode it will only run Windows operating system and few key programs. That means all other processes are stop so it is a way to limit any malware from launching.While you are restarting or rebooting your computer at the first load screen when you see your Computer configuration hit the F8 key on your keyboard repeatdly until you get to a black screen with option of restarting in Safe Mode. Choose "Safe Mode with Networking" so that you can still get on the Internet.
Step 3:Download Virus Scanner/Removal Tools.I recommend downloading two to three different programs to find and remove the malware. One may do the job, but three will almost certainly do the job. These three have worked for me and come highly recommended by PC Magazine and CNET:
Step 4:Run Virus Scanners Download, double-click to install, accept all the defaults they recommend, and then run each. This will take a while. When the programs locate a virus or any suspicious items, allow the programs to delete the files.
Step 5:Reboot Normally.Reboot your computer normally; no need for safe mode. You should be back to normal now. If you have files backed up on an external drive, plug it in and use the security programs you downloaded to scan that drive before you open or transfer any files.If the virus is gone, go to step 6.
Many people will recommend you reinstall Windows or try system restore or download a registry cleaner. I say that at this point, most people should take the computer to a local PC repair shop. Where I live, it costs about $120 to get the virus removed and a clean version of Windows installed. It is a personal decision how you proceed from here, but take into account the value of your time.
Step 6: Add Security.How did you get that virus in the first place? Even if you don't know, it's clear you need more protection. PC Tools is a real-time virus scanner that you can use as your ongoing protection, or install something like Avast or AVG. All three are very good, free, anti-virus programs. Also Microsoft's Security Essentials comes well recommended.
You should also go to the Control Panel of your computer, and in the security section click Windows Update. Make sure that it's set up to regularly update. And if you think someone else accidentally installed malware on your computer, it's a good idea to give other members of the family their own sign-on accounts that don't have admin privileges. This way, if the kids try to download software that could harbor viruses, they won't be allowed to. And yes, this means you should keep your admin password private. (Also, if they've installed any file-sharing programs, now would be a good time to remove them. P-2-P music and movie sites do expose you to a lot of junk.
Step 7:Damage Control.Viruses are a gateway to identity theft and spam. So after you disinfect your computer it's a good idea to check your credit (annualcreditreport.com is the credit report site that the Fair and Accurate Credit Transactions Act forced the credit unions to create for consumers to access yearly free reports). You should also change all your passwords, especially your email password and any passwords for your financial institutions.