I follow these steps, in regedit but I cant find it on services tab.change the price? do you mean change the value?
is this what you are doing? https://www.windowscentral.com/how-disable-and-remove-game-bar-windows-10-creators-update
this shows where it should be in the registry - http://servicedefaults.com/10/xbgm/
The thing is that I cant find this to change its value. I follow the steps HKEYLOCALMACHINE->.....Services.. and cannot find itwell, if you changed its value to 4 then its disabled and won't be running anyway
common question: https://answers.microsoft.com/en-us/windows/forum/apps_windows_10-win_xbox/turn-off-xbox-game-monitoring/008333cd-3bb0-4345-9f73-4d2bf62c4762