the best way ive beaten viruses was no anti virus, those are absolute shit against a fully undetectable virus. Any virus that is good enough to be FUD will usually screw with a few settings. In the past they used to disable task manager but they have gotten better to where they dont show up on a task manager. Plus they also might disable your AV and possibly block some websites. If you notice your PC's been messed with before the keylogger has time to steal loads of info, you can try resetting your computer to a earlier time (like if you figured out a virus just installed on your PC you can reset your computer to the latest date possible which will set your computer a few days back) I have done this before in the past and very successfully removed viruses. But now i hear they can disable restoring your computer, so then you might be screwed. Also preventing them is best, since there usually binded with other programs like music files or photos, when you open the song or picture it should normally just open right away, but if it ever says something like a program is trying to run and you have to click allow or dont allow, that is the virus trying to run since its a .exe but it cant install on your computer until you click allow or run.