The thing I hate about supporting Windows is that MS really doesn't make it easy to troubleshoot faults.

Someone asked for help on MS answers for Windows seeming to hang at the Welcome screen. The support response was to 1)perform startup repair 2) roll back to a previous restore point 3) boot repair 4) Windows repair

None of these things worked but this is the sort of support I see daily; throw everything at the wall and see what sticks.