Actually Mike, a lot of people seem to be having these issues, that's what I'm finding in various forums, and nobody is coming up with a fix. Here is a post on another site. One person found a fix that worked for them, but it hasn't worked for others.
File Explorer keeps crashing - Windows 10 Forums There was a windows update last night, so I installed it. I didn't have time to research what was inside of that update, but I'm hoping that it will improve the problems.
After the update I was again able to access 2 hard drives at once, without the lag, but the problem has to a point been intimmitant since installation so I will have to wait until it occurs again
As for your question about how many processes, absolutely none!
You're talking about a 16 gig RAM i7 doing absolutely nothing but trying to access File Explorer
The green bar does continuously roll though, still.. While I'm looking at any given file, it appears like it is continuously 'searching' which is definately some sort of bug
Also the sound issues aren't rectified. If I want to use headphones, I have to disable the speaker and then enable headphones, and to go back to the speakers I have to do the reverse.
If I'm just using the computer and plug headphones in, it won't make a change, which again is annoying, and there are lots of people on google who have not found a fix yet, and others who have