Hi, I'm currently experiencing an issue where by if i reboot the server from within windows it wont come back on unless i go into the so you start control panel and hard reboot.
I've never had this issue on my 2 other servers with this provider.
You can try these this :-
-Enter Safe Mode with Networking
-Disable auto-restart
-Update your device drivers
-Change the power option
-Check for hardware issues
Hope this solves your problem.