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...