I faced this issue a few months back, where I could not patch one of our servers. Whenever I tried, I will got this : Error : Windows Update Standalone Installer Installer encountered an error : 0x80070005 Access is denied. Troubleshooting : Troubleshooting 101 - check the service. Turned out, Windows Update service could not be found in the server... Resolution : There are 2 easy ways to resolve this.... Method 01 : 1) Go to a working server. 2) launch REGEDIT. 3) export below Registry key. Registry key : HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv 4) import to the target server 5) restart the server Method 02 : 1) Apply below Registry Keys to the server : [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv] "PreshutdownTimeout"=dword:036ee800 "DisplayName"="Windows Update" "ErrorControl"=dword:00000001 "ImagePath"=hex(2):25,00,73,0