The only antivirus software I use is windows defender. That is currently shut off.
Also my don.net 3.5 installation is fine. (Still ran the .net repair but no change, built a simple C# app that targets .net 3.5 and it the release executable run just fine).
I’ve killed nearly every possible killable running process (http://imgur.com/a/39DEC Screen cap of current running processes) Still same crash.