First of all, to disable all the other Xbox services: right-click Start, click Run, enter ‘services.msc’—backup the list before making changes by right-clicking at the top left ‘Services (Local)’ -> ‘Export List’.

Now find all the services involving Xbox, right-click each one and do the following:

• General tab: change Startup type to ‘Disabled’

• Recovery tab: change all three conditions to ‘Take no action’

Feel free, with caution, to do this for any other unwanted app eg., wallet, maps, fax/printer, cloud and/or updating services for Razer/Adobe/Skype

Now to get around Denied Access to Xbox Game Monitoring. Do the following. Right-click Start, click Run, type ‘regedit’. Always backup registry before making changes.

• Locate: Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\xbgm

• Change Start REG_DWORD—-> (by right-clicking Start ‘change binary’) then change the first 03 to 04 —-> the value will update from 0x00000003 (3) to 0x00000004 (4)

The service is now disabled. You can Restart your computer. Also if you want, you can now delete/rename the dll file located at C:\Windows\System32\xbgmsvc.dll

If you get an error that you need permission from the owner to make changes, then google how to transfer ownership of the System32 folder. I’d highly suggest backing up the System32 folder before altering any of the files.

After every Windows update check and re-disable the above along with the other Windows Gaming settings. Updates are highly likely to undo these changes.

 

Originally from the reddit article in:

How do I disable "Xbox Game Monitor" Service?
byu/ReadFoo inWindows10