My laptop got hit by viruses a couple of time recently. Both times I could Google and pin-pointed the exact virus. There were articles on how to "take it out" by editing registry and all that. I don't trust any of that. Many of those steps could not be performed when the virus has taken over anyway. Both times I used Acronis to restore to a good running OS and then restore my data files.
Not sure if Acronis is available to your hardware. The time saving from having to re-install Windows and then all your apps... it is well worth the 30 bucks or whatever.