Hi Ivory
Seems you have these two nasties in here...
Have "Hijack This" fix all the following items in the list below by placing a check in the appropriate boxes.Confirm that you have only the listed ones checked, then press <Fix checked> and Close HJT.O2 - BHO: Windows Genuine Tool - {c815ace8-3dbf-4ffd-8231-ab1d21e8b7ee} - C:\WINDOWS\shginas.dll
O2 - BHO: AddressBar Class - {f65b197f-8260-4d52-909a-f70118e646eb} - C:\WINDOWS\system32\iasada.dll
You are currently using an unpatched version of Microsoft XP. It is
CRITICAL that you update to
Windows XP Service Pack 1a IMPORTANT:
DO NOT update to Service pack 2. Doing so before your computer is clean can cause Windows to become unstable.
We will update to SP2 when you are clean. Please post back with a HJT log and your computer running with Service pack 1