Download Malwarebytes and run it.
Also use
Ccleaner
here's a link to using malwarebytes, sounds like you've got some malware on the PC.
Instructions Third post down.
Good Luck.
Disclaimer, this is my personal recommendation and not in any way the recommendation of ATS.
I give no personal guarantees, this is what I would do if it was my computer.




) and removed it that
way. So far, it hasn't popped back up at least.