Thanks jgtech. I already use Malwarebytes, it's found nothing. Although a while ago, Windows quarantined a Lodi trojan. Perhaps some malware is still lurking undetected. I'll try a couple of other...

Over the past couple of weeks I have been experiencing either severe lagging or complete freezing of my pc. In task manager the culprit seems to be Client Server Runtime Process (gpu 0 - 3d), which...