Do this on your computer. Start or restart the machine and as soon as you see the manufacturer's logo
on the screen, immediately start tapping the F8 key at the top of the keyboard about once
A black startup menu will appear. Using the arrow keys, select Safe Mode with Command Prompt
and press Enter. A bunch of information will scroll by. Log in when prompted.
You'll come to a black screen with a blinking prompt. At the prompt type: rstrui.exe
and press Enter.
System Restore will launch (may take several moments to open)
If not, click choose a different restore point and click Next.
You'll see a list of restore dates. Select one just prior to the infection and click Next, then Finish
and run the restore. This will return your computer to it's pre-infection state.