Geralt_of_Rivia: Huh, what? Since when? As long as it isn't a system critical service that makes Windows crash when it is stopped you can start and stop services at any time. No system restart required.
My machine didn't require that but all testlab PCs did. At lest when it comes to that particular service and switching from 'Disabled' status.
Apparently you can start / stop services at any time, but not enable it if it's disabled. It is probably dependent on some policy setting or Home / Pro OS version.
Nevertheless if it doesn't work even on some of our testlab comps, it won't work for ~100x amount of users ;)