do you have the program to restore your computer? It's easier to restore your computer to an earlier period.

Follow these instructions:

Go to control panel, click on performance and maintenance (you should be in category view not in classic view), click restore (found in your left panel), then select the radio button "restore my computer to an earlier time", then click on next.... and so on.

If you still have a problem, I suggest you use Hijack Scanner by BulletProofSoft.com, they have a free edition program.