OK, you will need to run some antivirus stuff.... Malwarebytes : Free anti-malware, anti-virus and spyware removal download
You may need to rename the executable if it cant run The home of Spybot-S&D!
Spybot is good but be sure you immunize avast! - Download Free Antivirus software or Internet Security
Run a boot time scan... might take some time but well worth the wait
If they fail you might want to run Bleeping Computer Downloads: ComboFix Download
be sure your connected to the internet and run with admin privileges
You may need safe mode with networking... that can normally be selected by repeatedly tapping F8 before windows boots.
You will also have to temp disable your antivirus to allow it to run correctly