We have an XP Pro laptop that's lost the ability to run .exe's. It won't run anything in the Run sections of the registry. It will run Malwarebytes, but nothing is found. I can access the registry by running Start regedit.com at a command prompt. I've compared HKCR\exefile, .exe, etc to a working machine and found no differences. I think I've tried everything at EE under the title of this question and related variations, and I'm stumped.