Windows 10: Download folder takes an age to load

I seem to have found a solution (at least on my PC), I went to the View Tab in File Explorer....clicked on Options and then the View Tab on Folder Options Window. Scroll down the list until you see the Checkbox for "Launch folder windows in a separate process" and check that and click Apply. Hope it works for you.....

 

Frankly, I'm astonished that Microsoft doesn't just default all folders to "General", then only set "Pictures" for the pictures folder. Don't try to guess... because sometimes people have mixed documents in a folder.

Also, if this doesn't work, I saw someone suggest that you change all files to Read/Write. Something about them being read-only can contribute. Also, change the folder to show details instead of icons.