The results from the DMP files do not give a definitive answer. While we investigate further here are a few things that you can do.
1-Run a system file check to verify and repair you system files. You do this by typing cmd in search, then right click and run as admin. SFC /SCANNOW
2-Download a copy of Memtest86
and burn the ISO to a CD using Iso Recorder
or another ISO burning program. Boot from the CD, and leave it running for at least 5 or 6 passes.
Go into event viewer (type eventvwr in search). Go to the windows log>application tab.
You want to look for critical errors (they have red in the left column ).
When you find them you want to look for critical errors that say app hang, app crash, or anything that relates to the problem.
When you find them please note the event ID, and the source codes and tell us what they are.
Please go to start>search>type device manager.
Are there any "unknown devices" with yellow triangles on them?
Is you driver there , listed, and working?
If your driver is missing, or there is a yellow triangle on it, you will need to update it.
please run Verifier with these settings:
Using Driver Verifier is an iffy proposition. Most times it'll crash and it'll tell you what the driver is. But sometimes it'll crash and won't tell you the driver. Other times it'll crash before you can log in to Windows. If you can't get to Safe Mode, then you'll have to resort to offline editing of the registry to disable Driver Verifier.
So, I'd suggest that you first backup your stuff and then make sure you've got access to another computer so you can contact us if problems arise. Then make a System Restore point (so you can restore the system using the Vista/Windows 7 Startup Repair feature).
Here is the instruction: Driver Verifier - Enable and Disable