I've been trying to install a few things, and they all stop because of an "installation in progress". I've been through a few threads, and I was lead to Windows Installer, but whenever I try to cancel it, it just won't go away, and the Startup Type is greyed out when I try to disable it:
I also tried to go through the registry editor, but I didn't have the same type of files in the other thread, so I'm a bit lost. Any help is much appreciated, I just want to update things.

I also tried to go through the registry editor, but I didn't have the same type of files in the other thread, so I'm a bit lost. Any help is much appreciated, I just want to update things.