Scan with HijackThis and then place a check next to all the following, if present:
C:\Documents and Settings\William V. Wilson\Local Settings\Temp\McAfeeInstall\Apps\msc\mcinst.exe
O2 - BHO: (no name) - {FDD3B846-8D59-4ffb-8758-209B6AD74ACC} - (no file)
Now, close all instances of Internet Explorer and any other windows you have open except HiJackThis, click "Fix checked".
I also recommend that you update Internet Explorer to the latest version here:
http://www.microsoft.com/windows/dow...a&mg_id=20510b