Note: groups.io will be down for maintenance this evening, starting at 11pm Pacific Time (6am Tuesday 8/3/2020 UTC), for up to two hours.
Re: netframework preview:
What Version of Windows 10 are you running.
There is a "regular" cumulative update related to .net framework for Version 1909 that has number KB4562900
It applied on my machine automatically and I elected to restart the machine myself rather than wait for it to do it by itself outside of active hours.
I'd be shocked if a parallel cumulative update does not exist for Version 2004 as well, but I don't have the KB number for that.
Brian - Windows 10 Pro, 64-Bit, Version 1909, Build 18363
Life is the art of drawing sufficient conclusions from insufficient premises.
~ Samuel Butler, 1835-1902