Vista - Blue AScreen System_Service_Exception

Windows Vista Home Premium X64 bit
Antec 300 Case Antec 1000 watt Power Supply
Intel DP45SG Motherboard
Intel Core 2 Quad 3.0GHz Processor
8GB 1333MHz DDR-3 Non-ECC Corsair Memory
2 Gigabyte HD4870 1GB 2-DVI PCIe in CrossFire
Windows Vista Premium 64 bit on a WD Caviar SE16 500GB HD
Windows XP Pro SP3 on a Seagate Barracuda 500GB HD
3rd HD for Backup Seagate Barracuda 500GB [Vista only]
Maxtor 500GB 1 - Touch 4 Plus Drive External Backup [Win XP Pro]
Samsung 245T Monitor

System_Service_Error Message below:

System_Service_Exception
If this is the first time you've seen this Stop Error Screen restart your
computer. If this screen appears again follow these steps:

Check to make sure sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any Windows Updates you might need.

If problems continue, disable or remove any newly installed hardware or
software, disable bios memory options such as caching or shadowing. If you
need to use Safe Mode to remove or disable components, restart your
computer, press F* to select advanced startup options, then select Safe
Mode.

Technical Information:
*** Stop: 0X0000003B (0X00000000C000001D, 0XFFFFFA500679425F0,
0X0000000000000000)

*** WIN32K.SYS-Address FFFFF9600028E64F Base at FFFFF960000D0000, date
stamp 48D1BCA9

Collecting data for crash dump...
Initializing disk for crash dump... Dumping Physical Memory to Disk: 100
Physical Memory Dump complete...
Contact your system admin or technical support for further assistance.

Computer had been on about 2 hours and I had Win Mail open and Internet
Explorer was also open and was reading Washington Post News articles when
this stop happened.

Any ideas are very welcome.

--
Thanks for reading & responding,
Barron AKA drybones