If it doesn't exist, right-click -> New -> . Set the Value data to 1 .
Many configurations only open Port 443 for TCP. Enabling UDP for this port has been confirmed to resolve 0x3000008 on many Windows 11 systems. error code: 0x3000008 extended error code: 0x0
The 0x0 extended code means the system doesn’t have a specific sub-error to report. That usually makes corrupted app cache or Gaming Services failure the most likely cause—so focus on Steps 1 through 3 first. If it doesn't exist, right-click -> New ->
Reboot the host; Windows will automatically generate a fresh certificate. If it doesn't exist