Sleep state is not supported in MultiPoint Server
Symptom
The MultiPoint Server system is unresponsive after it has been in a sleep state.
Cause
MultiPoint Server does not support sleep state.
Resolution
To disable sleep state
Click Start, click Control Panel, click System and Security, and then click Power Options.
In the Select a power plan window, under Preferred plans for the Balanced plan, click Change plan settings.
Click the Put the computer to sleep drop-down list, and then click Never.
Click Save changes.