I have my XP disk at the ready.
Can't imagine that this is going to come to that. Still waiting to hear from some others I have asked to take a look at this, but try this....
Run HJT in Safe Mode and put the checkmark next to our "favorite entry"

O2 - BHO: (no name) - {F0033F3A-37C3-486A-B827-F24D08C38331} - H:\WINDOWS\system32\sstts.dll

Click fix checked.
Exit HJT. Reboot to normal and run HJT again and post the log.