Yes, that's it, my XP Pro SP3 system has no problem what so ever, it is just so weird - Terminal Services is set to Manual by default, yet it is running (as I would expect if avast needs the service running).
So if the Remote Desktop Services is the new Terminal Services in win10, why its not running (or run once and stopped) is beyond me. And more so, why aren't we seeing many more win10 with this issue.
Whatever the reason/issue, this certainly needs avast team input, added to the bug list and fixed A.S.A.P. After all this is no cosmetic issue but a serious issue that demands urgent action.