Howtogeek posted a guide about using the spersky Rescue Disk to clean your infected PC
When you're dealing with a PC that is completely infected in viruses, sometimes the best thing to do is reboot into a rescue disk and run a full virus scan from there. Here's how to use the Kaspersky Rescue Disk to clean an infected PC.How to Use the Kaspersky Rescue Disk to Clean Your Infected PC
There's lots of ways to clean an infected PC, like booting into an Ubuntu Live CD and scanning for viruses, but this is an extremely simple and free solution from a trusted anti-virus vendor.