Yeah, the AV thing is a bit of a catch... I mean, there is so much talk about "layering" of services to catch stuff, but to resident, real-time AV it just does not apply.
Anyway, first off, would you go to this site http://www.f-secure.com/blacklight/ and download the trial scan software [link is at bottom of webpage]. Start it, accept the agreement, and start the scan. Post the log.
==Download this temp file cleaner from http://www.atribune.org/ccount/click.php?id=1 --click in the download window to run it, and when ATF Cleaner opens go Select all, and then Empty Selected. Close ATF.
==Next try an online scan at panda:- http://www.pandasoftware.com/products/activescan?
-the link to the scan is just above the padlock pic.... free online virus scan.. enter a valid? email and follow through, choosing My Computer for a full system scan.
Post the log it produces here.
==Finally, please rename Hijackthis.exe to clickme.exe and start it again, select Scan only and place checks against these entries [if they still exist], and press Fix checked.
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing)
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing)
O20 - Winlogon Notify: psfus - C:\WINDOWS\SYSTEM32\fusstub.dll
Make another log and post it along with the other two..