Ok, after an partial windows update (failed and good) my b4a has stopped.
Not only that, non of MS Fix It works either. I was wondering what is in common to both programs so I can locate and replace.
I had a recent Windows update that messed up one of my computers, and it was an update for dot net framework. I ended up doing a system restore to the last saved slot before the update. It fixed my problem, then I told Windows Update to never ask about that one again.
I'm not sure why it wasn't working for me. The problem I had was it slowed my usually very fast computer down to a crawl.