Your computer won't start up without lots of things going wrong. Your antivirus (AV) program tells you there are 1000s of infected files, or it won't update, or won't even run. How do you get rid of a nasty infection like this?
Please read this entire article before doing anything, and if you feel lost, DON'T proceed,
find someone who knows what I'm talking about. This will be better than
destroying your drive or your friend's computer!
You're going to need some things:
- a good friend who'll let you use their computer (and drive case), unless you have a second machine
- a second computer, working perfectly with a good, up-to-date AV program (anti-malware would be a plus too)
- an external USB drive case to put your hard drive in, or be able to plug the drive inside the second computer (in a desktop only)
If you have access to a USB drive case the right size for your drive, mount the drive in the case. You can then plug this in to the good computer.
If you don't have a drive case, you'll need to open the good desktop up and connect your drive to the second drive cable. The boot hard drive must stay there of course, on its own drive cable. You'll need to disconnect the CD/DVD drive to do this, and any other drive connected to that second cable, so that your drive is the only one on that cable. You'll need power for your drive as well, of course.
To run a virus check you can usually right-click on the drive in My Computer or similar, and select a virus scan from the menu, like the example with AVG below.
This scan will take a while. Set to full speed scan if your AV program allows this, and let it go. When this has finished, remove all the infected files listed. Run the anti-malware program as well. If you think it necessary, run them both again!
While you've still got the drive in the other computer, and AFTER you're sure it's clean, back up any important documents to the drive on the other computer (and then check them again for viruses!).
When this has all finished, shut down the computer and put your drive back in its own computer. If you're lucky, it will actually boot, but this may not be the case. You may need to repair/reinstall Windows on your drive, as some of the files quarantined or deleted may have been system files.
Now you know the value of having a working AV program, don't ever operate without one again, and always keep it up-to-date.