I've been running into issues with cumulative updates failing on my windows 2016 remote desktop server farm. So far the 2019-02, 2019-03, and now the 2019-04 KB4493470 CU are failing to apply from my WSUS server and from catalog.microsoft.com offline bundle.
I've already tied the following to save you time...
Any suggestions are welcome and I've attached the CBS logs if I should include anything else please let me know.
net stop wuauserv
Ren %systemroot%\SoftwareDistribution SoftwareDistribution.old
net start wuauserv
DISM.exe /Online /Cleanup-Image /RestoreHealth
DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:F:\sources\install.wim:1/LimitAccess
sfc /scannow
net stop wuauserv
net stop bits
Remove-Item –path c:\windows\SoftwareDistribution –recurse
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v AccountDomainSid /f
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v PingID /f
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v SusClientId /f
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v SusClientIDValidation /f
net start wuauserv
net start bits
