Could be virus, overheating or a component gone bad.
First download hwmonitor or coretemp(CPU), msi afterburner(GPU)
start the game and randomly look at the temps (cpu shouldn't go over 65 degrees while gpu no more than 85 degrees)
If temps are fine,
download adwcleaner, roguekiller junkware removal tool and malware bytes anti malware, scan and cleanup.
If this is fine, we need to test the GPU and Powersupply.
The best thing to do is chang with a similar part that is working ok.