Hello all. I have been researching this issue for a while, but none of the suggested fixes I have found and tried have had any effect. I've tried numerous setting change suggestions with indexing, File Explorer options, etc, but nothing has improved this issue even slightly. Even a complete clean install when I recently upgraded my SSD had no effect.
The issue is that my file explorer starts out normally fast when first opened. For example, opening my downloads folder(located on my desktop) and fully populating all thumbnails, etc, takes about a second the first time you do it. However, within a few seconds that speed is replaced by EXTREMELY slow performance. For example, if I open a subfolder under downloads, then attempt to return to the downloads folder, it will take 45 seconds to 2 minutes to perform the same action is just did in less than 2. During this time, CPU load never exceeds 10%, Disk usage never exceeds 1%, and Memory usage never exceeds 25%. The second or third navigation request within Windows Explorer will start the issue every time. It will stay this way until you restart Windows Explorer from the Task Manager, upon which it will be normal speed again for a few seconds, then immediately revert to the exceptionally slow behavior. It is so slow that the fastest way to navigate is to constantly restart the process every time you need to change folders. All other programs and features operate perfectly normally.
This is not a hardware speed issue, as Windows 10 ran perfectly fine on this machine. It's an i7 8700K with 32 Gigs of RAM on a Gigabyte Z390 with a Samsung Evo 980 M.2 SSD. This should be lightning quick at such tasks.
I could really use a hand here, this is a completely unacceptable situation.