Problem
I have a 27" iMac with a 1TB Fusion Drive. I have Bootcamp running with Windows 8.1 installed on a partition. When I boot into Windows and leave the computer idle, I come back to find it has restarted and booted to the OSX partition automatically.
Admittedly, I don't use the Windows partition very often, but when I do use it I tend to be gaming. I will play a few hours and leave the PC idle while I take a break. I come back hours later, or sometimes the next morning and find the PC sitting at the OSX login screen.
I know Windows 8.1 automatically reboots to install updates on occasion, but last night I was doing some maintenance on the Windows partition and did all available Windows updates/Software updates. I then rebooted an additional time and began a CCleaner Scan.
I left the PC and went to bed. This AM I come to my desk and it is sitting on the OSX login screen again.
Question
What things might cause something like this?
Things I have checked:
- Power Options - There seems to be no option that could cause an automatic reboot if left idle
- Automatic Updates - While this can cause a reboot when left idle, I have tested this theory by running all available updates and performing reboots before leaving the PC idle. Still a possibility, I suppose, but it's becoming less likely.
- Crashing programs - I have no errors in the Event Viewer or startup warnings after booting back into Windows
I greatly appreciate any tips/advice you may have.
Aaron
event viewer
on the windows install to see why/if it's shutting down?