Same old problem.
System restore to an earlier date is the solution.
Turn off the internet connection.
Start the rig and press F8 new screen follow to set my computer to an earlier time or words to that effect. Use the NSEW [arrow keys] keys on the key board to attain this press enter and merely wait and then allocate the date prior to this incident.
When completed employ a full anti virus and malware programmes and you should be clear.