Hi and welcome
What Anti virus and Antispyware programs do you have installed?
Have you scanned from safe mode? How to start Windows in Safe Mode
Do you have pop up ads to buy malware cures?
Run this and post back how things go
Download,install and Update
the free version of SUPERAntispyware,
Under Scanner Options make sure the following are checked (leave all others unchecked):Close browsers before scanning.
Scan for tracking cookies.
Terminate memory threats before quarantining.
Click the "Close" button to leave the control center screen and exit the program.
Now reboot into Safe Mode ,Start the program and Scan
Open from the desktop icon or the program Files list
On the left, make sure you check C:\Fixed Drive.Perform a Complete scan
. After scan,Verify all items in summary screen are checked.
Click OK on the summary screen to quarantine all