Windows 7: Laptop Unexpected Shutdowns - Cause Unknown

I am wondering if I can get any clues to this persons issue from the dump files. Would anyone mind taking a look?

This is a Compaq Presario F700, AMD Turion64-X2 TL-60, 2GB RAM, w/ nVidia 7000M graphics, purchased summer 2008. Came with Vista.

Windows 7 installed clean summer 2010. Home Premium 32 bit, retail disk.

The main issue is a failed optical drive. An attempt to read any media results in a "Drive is not accessible. The disk structure is corrupt and unreadable."
Laptop DVD-RW Issue: "The disk structure is corrupted and unreadable"
An attempt to read a data DVD, created myself - works on other computers, results in a system freeze and a screen that looks like the picture below.



But the owner says that the system was randomly shutting down before the optical drive failed. I can't get any useful information from her on any errors. Worse, the laptop is now 3000 miles away. I was able to snag some dump files to a stick before she left.

Sorry for the saga. But I'm wondering if the fail(ing) drive has anything to do with the shutdowns or vice-versa. What do you think?