Downloaded but stuck on 35% install for at least an hour.
Also trying to install cumulative junk for the umpteen times with download error that is wearing out my hard drive with Net junk I will never use
UPDATE 9/11: Today we have released Cumulative Update Build 20211.1005 (KB4581021). This update does not include anything new and is designed to test our servicing pipeline. Thanks to reports from Windows Insiders who repo
Don't know if this has anything to do with anything or if it might help, but...
I routinely empty the contents of the C:\Windows\SoftwareDistribution folder before downloading a new build and delete the Windows.old folder.