mgorman, first of all I want to thank you for filling out your System Specs.
I would like to concentrate on the memory that is installed on your machine, and rule it out once and for all.
All of your stop errors are related to memory and/or the way the memory is handled.
From the way you describe the symptoms the system is not handling the release of memory when it is being shutdown, and occasionally it affects startup.
I notice in the one CPU-Z-SPD tab report
here That the stick is installed in slot#3. Have you tried running this stick in any of the other three remaining slots?
And, if you did not rotate the stick as suggested
here under
Technical Information in
Troubleshooting Memory Errors while running the memtest86 your test results are inconclusive.
I ask this because one MB I had was
very particular where the memory was installed, and it took me several hours before I found the right combination and the MB would run properly.
If you have kept this stick in slot#3 the entire time we have been trying to troubleshoot, here is what I want you to do.
Remove the stick, and install it in slot#1.
Use the machine like you have described; with the rebooting after an hour, several hours, and/or immediately after you make the change, and observe the result, does it increase/eliminate the BSODs or no change?
Then try slot#2, and #4 in the same manner, and observe the result.
Please post back on your findings.
There is also a distinct possibility that your MB will have trouble in running only one stick of ram.
Crucial, the memory company is ambiguous on whether or not your MB requires a matched set of ram. See
here
In the Manufacturer Specs section it states:
Although the memory can be installed one module at a time, the best performance comes from using matched pairs of modules.
But, a little lower it states:
Q: Do I have to install matching pairs?
A: No.
No, you can install modules one at a time, and you can mix different densities of modules in your computer. But if your computer supports dual-channel memory configurations, you should install in identical pairs (preferably in kits) for optimal performance.
Q: Does my computer support dual-channel memory?
A: Yes.
To benefit from the performance advantages offered by dual-channel systems, you should install memory in identical pairs. Installing a kitted pair is the best way to ensure that your modules are identical, right down to the chip count.
Although Windows 7 can run on one 2GB stick of memory I feel your machine is being starved for ram. it is like putting a two barrel carburetor on an automobile racing engine, and until you can obtain another stick of G.SKILL 1x2GB DDR3-1333 or a matched set of at least 4GB from a friend or family member this issue of stop errors will never go away.
