Solved Crash/Reboot During Sleep

I've noticed an issue with my system rebooting when I leave it sleeping for too long, usually overnight. Applications are typically still open when I tell it to sleep (come on, that's why I sleep instead of shut down), but it has happened even when none are running (none from Metro either). According to the System Log, the system has gotten more than a few errors recently, especially coordinating to the most recent time it must have crashed during Sleep (around 0100 last night, roughly 5 hours after I told it to sleep), but I'm not knowledgeable enough to know what causes them.

Most of your minidumps are pointing to the driver: atikmdag.sys which is your ATI graphics card driver.

I would un-install the drivers via control panel and then re-install the latest versions:

AMD Driver Autodetect

If you're playing any games that uses Direct X 11 try using Direct X 9 if there is an option to select that for testing purposes.

Make sure you have all the windows 8 updates until there are no more if you have not already.

That's all I got, hopefully the experts will have more information for you...

-cheers

Left it in sleep with several programs up for about 12 hours, problem seems to be fixed. Thanks.