viruses everywhere

Hello all i’m having problems with my girlfriends computer. It seems to have contracted a couple of viruses, specifically the trojan-gen, trojano-1175, trojano1218. I did some work with the computer by disabling system restore and updating my spyware and virus protection and then rebooted in safe mode. After this i ran Avast, CWshredder, spy-bot, about:blaster, among others. None have seemed to work, and i still get the annoying about:blank when i start up Internet Explorer and Avast jams me up with virus alerts. Also, i have a hijack file if anyone needs it. thanks.

Which is your operational system?
Can you run a boot time scanning?

Check out this link if it is about:blank browser hijack - http://www.adwareaway.com/index.html

For an on-line scan of your Hijackthis log file try here http://hijackthis.de/index.php
Ignore any 023 reference to avast processes, this is a hiccup in the HJT 1.99.1, if you need any help with any of the analysis let us know.