In the image I intend on attaching you will see a photo of my desktop monitor/screen when said desktop locks up hard. It is a seemingly random lockup that doesn't seem to discriminate against what distribution I'm running. I have the following installed and the system has locked up when running all of the Linux OS's. (no matter what OS I'm running)
Linux Mint 13
The desktop system stats are in my signature. In all cases I'm using the default nouveau graphics drivers. In the case of Windows 7, I rarely boot that so I don't remember if it happens with that OS or not. So where would one begin with troubleshooting? Would there be any clues in the log files, like something that occured just prior to the lockup?