Is this the only folder that you have noticed this problem in? My thoughts are to try to run a elevated cmd prompt and "taskkill /f im explorer.exe" It's been a while, but I think it will either just close all explorer windows or it will also open an explorer window. Either way, try re-opening an explorer window and play with your downloads folder again. If that does nothing, try playing with the search functionality or recent items filtering or dropdown items filters. Something unexpected might be causing this delay. It could also be some kind of anti-virus program that specifically looks at the downloads folder and tries to automatically scan it every time you open it.