My Computer, Properties, Advanced, Startup and Recovery and untick Automatically restart. While you are there make sure that Small memory dump (64 KB) is selected and the output is %SystemRoot%\Minidump. The Blue Screen will dump the Minidump file.
This will Blue Screen the PC. Take note of Stop 0X000000 error message and post it.
Or if you are feeling adventurous
Minidump Files can be found here. C:\WINDOWS\Minidump\Mini122707-02.dmp
How to read the small memory dump files that Windows creates for debugging
http://support.microsoft.com/kb/315263
To download and install the Windows debugging tools, visit the following Microsoft Web site:
http://www.microsoft.com/whdc/devtools/debugging/default.mspx
Instructions on using Windbg.
Open Windbg and select file, Symbol file path and brows to the Symbol folder that you have downloaded and installed Symbols to, select OK.
Close the workpage and save the Workspace information. This should lock in the Symbol path.
Open Windbg and select file and select Open Crash Dump then navigate to the minidump, highlight it and select Open.
There are two ways to use !analyze -v the easiest is to click on !analyze -v under Bugcheck Analysis.
When you have ran the initial dump if you look to the bottom of the screen you will see kd> to the right of that type in !analyze -v and press the Enter key.
Ctrl + a will let you copy the information and paste it into notepad.
Look to the bottom of the page for information like this. This was fixed by updating the Graphics Drivers.
FAULTING_THREAD: 864f6a98
DEFAULT_BUCKET_ID: GRAPHICS_DRIVER_FAULT
CUSTOMER_CRASH_COUNT: 1
BUGCHECK_STR: 0xEA
PROCESS_NAME: logon.scr
LAST_CONTROL_TRANSFER: from 00000000 to bfef0fea
STACK_TEXT:
f6434e6c 00000000 00000000 00000000 00000000 sgiul50!DrvBitBlt+0x585
STACK_COMMAND: .thread 0xffffffff864f6a98 ; kb
FOLLOWUP_IP:
sgiul50!DrvBitBlt+585
bfef0fea 75f9 jne sgiul50!DrvBitBlt+0x580 (bfef0fe5)
SYMBOL_STACK_INDEX: 0
SYMBOL_NAME: sgiul50!DrvBitBlt+585
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: sgiul50
IMAGE_NAME: sgiul50.dll
DEBUG_FLR_IMAGE_TIMESTAMP: 3b7dfec7
FAILURE_BUCKET_ID: 0xEA_IMAGE_sgiul50.dll_DATE_2001_08_18
BUCKET_ID: 0xEA_IMAGE_sgiul50.dll_DATE_2001_08_18