Blue Screen of Life?

[PRB]

Here's what my Windows 10 computer looks like after it boots. This isn't the blue screen of death. The computer is "running", more or less. The mouse cursor is there, and it responds to mouse movement. But that's all it does, lol. I Googled "Windows 10 blue screen with cursor", and found a couple of alleged solutions, none of which have worked for me. I even threatened to blow away Windows and install Linux. That didn't work either. It thinks I'm bluffing. Little does it know...

[Naismith]

Ahhh MS and annoyances. My W10 64 resolutely refuses to allow me to change file associations. I want e.g. .cfg files to open in Notepad automatically without having to do the Open with thing and ticky box to do it as it won't stick. All searches on the interwebs point to the usual easy solutions but that don't work either.

Strangely it does allow me to alter default web browser and programs which alter picture, video and audio files away from the default. It's damnable. No bug deal just a pain in the butt.