Not wanting to beat this to death, and probably on the wrong forum, but wanted to share something that could be useful if you run into this frustration.
Got win 10 working outside of a 10 minute startup to stabilize, and the irritation of having to give permission to normal startup routines. Decided to keep it for now, praying for updates that will speed things up and resolve the freezes. DAW, soundcard, control panel working if I don't try to access anything too soon.
Soundcard was implicated in the screen hangups, so uninstalled it and the dreaded security halt blocked the program when I tried to reinstall.
Found a bunch of arcane fixes to circumvent the blocks. Only one approach is simple and seems to work okay.
So scenario is that you try to install something and windows has blocked the installation for your "protection".
Fixes advised are creation of a temp administer login to circumvent. Other fixes involve copying sequential DOS codes since access to security levels not as friendly in win 10.
Appreciate the attempt with win 10 to "upgrade" on top of the existing OS, unlike the major destructive win 7 upgrades where you got maybe 5 percent of your programs that still work. Problem in trying to preserve the past is that drivers and whatever may not be compatible. Total crap shoot. Success of what restarts depends on what you have on your computer before the "upgrade".
If you are blocked from installing anything trying to salvage your way out of the mess, do this:
Have your software executible in an easy to access place. I did the soundcard exe directly on the C drive for convenience.
Right clck on the start button and then select Command Prompt (Admin).
Type in the pathway to the program exe, cab, msi whatever. Include the name of the executible.
Hit the button, then Plug & Pray.
Life should be conditional bliss from that point onward.
John