I'm not one for introductions so I am going to get straight to the point. I was trying to download to 1.16.1, as I updated my server today. When it got to about half-way, it crashes and says
Failed to download file.
Filename on disk: 5f0618d264e980e49f589f58f61c201c88bba14b
Path: C:\Users\(my name)\AppData\Roaming\.minecraft\assets\objects\5f\5f0618d264e980e49f589f58f61c201c88bba14b
Edit: I just noticed it says something different every time.
Run a scan with adwcleaner.