Either a hardware issue which could be a graphics failure so I'd check my warranty. Be sure your files are safe on backups since the maker and even out of warranty may do a reset to see if it's a banged up OS.

At the very least you make sure your backups are current then scan with Grif's help at http://www.cnet.com/forums/discussions/how-to-remove-pup-option-603542/#post-f742c795-5881-433b-a29b-6d758efe5cd3

After that I'd think about heat issues. I have no details about this PC but it sounds like a laptop. No mention of model, age and other data so I can't lean towards other advice yet. Can you run the USERBENCHMARK.COM test and share the link to the result?