remove. We've covered using the BitDefender , Avira , and Kaspersky rescue discs to remove viruses from computers. The "nuclear option" if nothing can remove the viruses properly -- or if the malware so damaged your system that Windows still isn't working properly after you've removed the viruses -- is reverting your computer to its factory state. Many computers come with restore partitions that you can access by pressing a certain key during the boot process (consult your computer's manual for the exact key). You may also have a Windows installer disc you can use to reinstall Windows. Note that this will delete the files and programs on your computer, so be sure your important data is backed up before you reinstall Windows from scratch. Windows 8 can be confusing, but now you can read our comprehensive guide that explains everything the easy way. There are over a thousand screenshots and pictures in the book to help you get the hang of navigating around Windows 8, and nearly a thousand pages of content so there's nothing you won't understand. Plus it's written in the classic How-To Geek style you're familiar with. Comments (46) For pesky root-kit type viruses and even some of your standard "you got a virus" viruses, I find ComboFix to be particularly helpful in clearing the way for regular scanners. If I have a virus that stops me from running my software, I'll run ComboFix and that usually fixes that issue. Then run my AV stuff (Security