Happy New Year.
I think you did something wrong back there. It could be triggered by Application Verifier or gflags-- it depends on what you did & you could freeze your computer if not utilized correctly. Additionally, you can’t just use WinDbg because it will not work (eg due anti-debugging mechanisms = to avoid reverse engineering). (Instead you should create dumps and that’s why I suggested that.)
Try undoing the guide. Otherwise, something else did happen and you were unlucky. Really sorry for your troubles. 