Yes the problem started up for me again also, sigh. Disabled everything in task manager/ startup programs, like nVidia. The only thing left enabled is my firewall and that's not going anywhere, even though it has a high startup impact.
The only thing that comes to mind is if you upgraded or reset recently like I did and still have a Windows old folder in C drive. Could that be it--System and Compressed Memory, Service Host and Windows Explorer rummaging around in that folder at startup? I can't test this theory right now either as the folder is too large for the recycle bin. I can't delete it.
Windows 10 is really on my nerves right now, I swear.