If the key doesn't exist, right-click in the right pane > New > DWORD (32-bit) > Name it UseWUServer and set value to 0 .

: Active VPNs often cause a "handshake" failure with Microsoft servers during the reboot phase of an update.

: Open Command Prompt as Administrator and run the following command to repair the Windows image: Dism /Online /Cleanup-Image /RestoreHealth .