It's a long time since I've had any windows 10 issues, but I do remember weir permission problems right after windows installation like notepad++ not being able to save any files anywhere even though I was on an admin user.
I don't remember exactly what I did that fixed those issues, but I'll try to get something up from that cellar.
Win 10 can be fidgety about administrator rights, even with an administrator account programs may launch without having admin rights, I'm sure VS opens files with the write permissions flag set, and then gets a denial from win 10.
So a user may have admin rights while a program opened by a user may not have it.
Find the VS.exe and open it's properties and tick the "run this program as an administrator" checkbox.
If that doesn't work:
Right click your hard drive → properties → security tab.
Check if Authenticated User have modify rights. like seen in this picture:
View attachment 511467
Check the security settings for all your hardrives, have a look at deeper folders here and there and see if they have those settings inherited correctly from the root drive.