KB5021089 Not Installing on Windows 10 – How to Fix?
While installing KB5021089 (cumulative update?) on Windows 10, there was some obscure error in the Windows Update. Restarting the PC doesn’t help and I don’t really have any other ‘fixes’. I haven’t had this problem with installing updates before. I have a legal copy of Windows 10, not pirated, so there should not be such issues, at least I don’t think so.
If you’re having trouble installing update KB5021089, we recommend that you read our Ultimate Windows 10 Troubleshooting Guide. You’ll find all the information you need there.