Did you install the updates before or after it started hanging.
How about any new software installed or updated before it started hanging?
Did you update any drivers?
Perhaps a program is running every night causing it to hang (that should be logged).
Possible virus or malware maybe (from one of the clients)?
Perhaps the AC in the server area (room) is set to shut off at night creating a heat 
issue?
Maybe a heat issue inside the server like a dying fan or simply clogged with dust 
(it wouldn't last 24hrs like that though)?
Maybe it's not waking properly from sleep or hibernate (known Microsoft problem)?

Just a few things to check for.

Good luck!

• Reply or follow-up to this message

• Search this forum
• Start a new thread on a different subject

• Report abuse of the forum