I am working on a vista pc which was badly infected. I scanned the hard drive as a slave using Malwarebytes, Comodo, and Bitdefender online scanner. Since sticking the hard dive back in the machine and booting it up I have also used Combofix (after realising the there was a name resolution issue). After that I manually updated the definitions in Malwarebytes (as no program can download updates) but the scan came up clean.
When I check the IP configuration it is all fine. I can connect to the router by IP address and can open up a website such as Google using their IP address but not the name.
I am guessing that one of the viruses has done the damage but cannot find out what!
I can post a Hijackthis log if anyone thinks it would help - please let me know.
Any suggestions would be appreciated.