|tap f8 on bootup and select safemode with networking.|
Then download these cleaners to your desktop and run them in the same order:
1- rkill.exe (it stops the process)
2- tdss killer (it will remove a rootkit if it's in there)
3- Malwarebytes (update it and run a full scan & remove all it finds)
Now if that doesn't clear it up, reboot and do the process again in the same order. That should fix your problem.
Some HELP in posting on Computing.net plus free progs and instructions Cheers