Windows 10 Build 19640 is is the twenty-first Insider Preview Build of Manganese. It was released on 2020-06-03 to all Insiders in the fast ring.
- If the users's download folder is synced to a cloud provider, it disables the option to have Storage Sense automatically clear your Downloads folder on a cycle.
- Login logic was updated, so if the user has their PC set up so they have to type their username while logging in, typing a space at the beginning of your username will not generate an error anymore.
Bugs and quirks
- Both the Documents and Downloads sections under privacy settings have a broken icon, and a rectangle is shown in their place.
- Taskbar preview thumbnails do not render consistently in this build (showing a blank area).
- Some devices may BSOD upon resuming from hibernate if booting from eMMC storage.