Google redirect virus removal help

I am an intermediate computer user running WinXP SP3, and use Avast! antivirus. I recently contracted a virus which disabled folder options in Windows Explorer, disabled regedit and system restore, and has hijacked my web browsing regardless of whether I used IE, Firefox (preferred), or Chrome. After countless hours of reading through forums like this one and using removal tools including HJT, ComboFix, and Ad-Aware, I have been able to correct all of the problems EXCEPT the hijacking. I read somewhere that I wasn't supposed to post any log files here until requested. Clicking on the link to gmail from my (fake) Google home page results in a warning of an unsecure connection and invalid site certificates, so I have been avoiding any site that requires logins/passwords. There was another topic here which contained discussion of a problem very similar to mine, but there seems to be a difference in the specific infected files because I had no luck in following the instructions given there. I would VERY much appreciate any help you can offer, and would be happy to provide any further info that you need. Thanks!

EDIT: Moved from XP to Am I Infected...please follow all admin suggestions/directions posted in AII from this point on ~ Hamluis.

Edited by hamluis, 03 April 2010 - 08:18 PM.

Anyone at all have any ideas on this???