Can you try to access the Windows 7 Advanced Boot Options by pressing the F8 key immediately after boot, you should see a menu like this:
Select the option Disable automatic restart on system failure if you see a Blue Screen with an error code, please post the error information.
Sadly I can't get to this screen. I only get to a similar looking screen but with two options, whether I press the F8 key or not. One option is startup repair. The other is start windows normally. The first runs but fails to resolve the problem. The second looks hopeful, but immediately crashes the computer which powers down.
Thanks for the suggestion though!
Done as requested. Took me to BSod as you predicted, with the following message:
A problem has been detetected ... etc.
If this is the first time yoou have seen this error screen .... etc.
Check for viruses on your computer. Remove any newly installed hard drives or hard drive controllers. Check your hard drive to make sure it is properly configured and terminated. Run CHKDSK /F to check for hard drive corruption, and then restart your computer.
*** STOP: 0x0000007B (0XFFFFF880009A97E8, 0xFFFFFFFFC0000034, 0X0000000000000000, 0x0000000000000000)
I hope this means a lot more to you than it means to me!