|Try downloading Malwarebytes Anti-Malware program, updating it, and doing a complete computer scan.|
Also get SUPERantispyware download it update it and do a full computer scan after malwarebytes has finished.
For best results, do this in safe mode and turn off System Restore.
To start your computer in safe mode, click "restart computer" and push f8 repeatedly while the system is booting up, you can either chose safe mode, or safe mode with networking (internet access).
Links to download the programs I have suggested.