How to troubleshoot specific STOP Errors
Here is a great tool to use for troubleshooting windows stop errors.
Most stop errors are either memory related, driver related, or disk related. This one seems to be disk related.
IF you have more than one stick of RAM try running the system w/o the other sticks, trying to replicate the issue. Once you have the issue happen with a particular stick of ram and not with the others - you have your bad ram.
If that isn't helping or the error is still happening on all ram, then look at the hard drive.