I tried running TDSSkiller and it came back with this:
TDSS rootkit removing tool, Kaspersky Lab, 2010
version 2.2.8 Mar 10 2010 15:53:20
Scanning Services ...
Scanning Kernel memory ...
Driver "nvgts" infected by TDSS rootkit!
File "C:\WINDOWS\system32\DRIVERS\nvgts.sys" infected by TDSS rootkit ... cure failed
Memory objects infected / cured / cured on reboot: 1 / 0 / 0
Registry objects infected / cured / cured on reboot: 0 / 0 / 0
File objects infected / cured / cured on reboot: 1 / 0 / 0
Press any key to continue . . .
After pressing a key the program ends and the symptoms remain. So it appears to detect something but can't remove it.