Windows 10, version 20H2 and Windows Server, version 20H2 | Microsoft Docs
Here you can find official information about known issues about Windows versions.
I had this same problem, then I ran the Windows Update Troubleshooter inside Windows Settings, and it fixed it.
BUT I have Conexant Audio Drivers, which are documented in the article I linked to, to have issues, since the Windows update version 2004 last year, I think that was May or October update.
Read the article see if you may have some driver or something else mentioned there affected.
Mi Windows Update, even though I could clean error 0x80004005, gets stuck at 61%. Every day I turn on the machine it tries to update again and again gets stuck at 61%. I left it overnight one day but didn´'t go beyond that %.