I thought i'd quickly mention this in case anyone has any virus issues down the line.
AVG is offering free "boot disks" that you can download, install to USB/CD and boot to run a virus scanner. Clever viruses these days will disable installations of other virus scanners and/or stop your computer all together. With the boot cd, you can virus scan your whole hard drive without worrying about further infection.
http://www.avg.com/us-en/avg-rescue-cd
Theres the link, The cd version comes in iso format, meaning you need to burn it to a CD using software. I personally like CDBurnerXP - ignore the name, it works with other windows versions :)
Davo :)
EDIT: both downloads are less than 70mb
F-prot, Kaspersky and Avira also have similar tools like these (antivirus on a burnable iso). Google kaspersky or avira rescue disk for downloads.