How do i uninstall update that it cant find?

Just some guesses:

You can check if the update is really installed with 

Get-HotFix | Where-Object {$_.HotFixID -eq "KB5050593"}

in PowerShell.

To check system corruption, you can run System File Checker:

sfc /scannow

Be aware that this could take a while :D. You can follow up with:

DISM /Online /Cleanup-Image /RestoreHealth

To look deeper and fix more complex corruption in the system image.

You can also try to remove the update via command line:

wusa /uninstall /kb:5050593

If nothing helps, try booting into safe mode. If everything works fine there, then something in your startup might be causing issues - could be drivers, malware, or conflicting services.