VS2010 Test Runner - Unable to start agent process

I can't run any tess in VS2010. Even tests that have run before. I remember setting some services to manual start a few weeks ago, but can't remember what!

Problem: Which agent process / service do I need to start to make this work?

Edit: Even after uninstalling and reinstalling Studio开发者_运维问答2010 (and taking off the Novell Netware Client which I though may be an issue) it still doesn't work.

Got it! Avira Antivirus (even when 'disabled') seemed to be the culprit. Uninstall of the Antivirus made everything work again.

I'm using VS2015, I was experiencing the exact same error as the original poster (OP). My solution turned out to be simply turning on the add-on's within Internet Explorer so that I could start recording proper tests of my webapp. There were 3 or 4 add-on's that I simply had to enable. After I did that, this error "Unable to start agent process" never came back.