I ended up turning off all that crap eventually. I cant remember what exactly I did but it was quite an adventure that involved registry edits and stopping services. Certainly not something that is made easy.
The setting I'm talking about is in Update Settings -> Change Active Hours. From your previous post, it sounds like you haven't disabled automatic updates, so changing when they update so it doesn't happen while you're working might be a good option, and it has nothing to do with the registry.
