Re: Been there. Done that.
"He had a *proper* freak out on me because I changed the sort order of his documents folder..."
When investigating a Windows user profile or application problem, almost the first thing I do is change the Explorer View settings to unhide System and Hidden files so that I can see what is really there. And I have to remember to restore the View settings, which doesn't happen quite as often as it should.
Over the years I have been amazed by the number of second line support people who don't realise that they should be looking for hidden stuff or files with strange ACLs.