I had a friend over looking stuff up on the net on my system. One of the sites he was on was infected but my antivirus blocked it. When i restarted my computer it was running at a constant 50% cpu usage.
I went to task manager and saw one of my svchost.exe running at 50%. I closed it out then my cpu restarted on its own. When I got back on its still running at 50%. I tried scanning for virus and malware but it showed up as nothing. I used avast and malwarebytes.