Possible Virus?

That's weird, are crash dumps enabled for your computer?

Also you can try running Spybot and see if it pics up anything: http://www.safer-networking.org/en/index.html

Also you can post a hijackthis log and post it back here: http://sourceforge.net/projects/hjt/

Virus scan with your antivirus(unless you're only using defender), make sure the definitions are up to date.

If you don't have one, you can try AVG free here: http://free.avg.com/us-en/homepage or Avast: http://www.avast.com/en-us/index

Yeah it's enabled.

Well, Spybot picked up quite a bit and removed that, but I've still got the errors when trying to access Windows Firewall/Defender/Security Center.

I typically avoid antivirus software because I've never had a really good history with them. Guess I might have to though.