Vista lockup - how to setup new Windows event logs

My Vista business system periodicaly locks up requiring a hard reboot (system
becomes unresponsive, mouse/keyboard don't work). There are no events
recorded in the default Windows Logs and there is no consistency as to when
the crashes occur other than that they have not occured when I'm away from my
computer (ie. I'm typing, or moving the mouse).

I would like to set up some custom logs of events or enable the appropriate
Data Collector Sets that would hopefully provide info on what is happening
prior to these crashes. I would appreciate any help or suggestions as to how
to set this up. ie. which logs are most likely to be useful, how do I set
these up or which Data Collector Sets to enable.

System specs
OS Name Microsoft® Windows Vista™ Business
Version 6.0.6000 Build 6000
Processor Intel(R) Core(TM)2 Quad CPU @ 2.66GHz, 2745 Mhz, 4
Core(s), 4 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. 1202, 28/03/2007
SMBIOS Version 2.4
Locale Canada
Hardware Abstraction Layer Version = "6.0.6000.16407"
Total Physical Memory 3,006.56 MB
Available Physical Memory 1.65 GB
Total Virtual Memory 6.06 GB
Available Virtual Memory 4.72 GB
Page File Space 3.23 GB
Page File C:\pagefile.sys

Display:
Name NVIDIA GeForce 8600 GTS
PNP Device ID PCI\VEN_10DE&DEV_0400&SUBSYS_043810DE&REV_A1\4&159 1CBDA&0&0008
Adapter Type GeForce 8600 GTS, NVIDIA compatible
Adapter Description NVIDIA GeForce 8600 GTS
Adapter RAM 256.00 MB (268,435,456 bytes)
Installed Drivers nvd3dum.dll,nvwgf2um.dll
Driver Version 7.15.11.6371
Memory Address 0xFD000000-0xFDFFFFFF
Memory Address 0xC0000000-0xCFFFFFFF
Memory Address 0xFA000000-0xFBFFFFFF
I/O Port 0x00009C00-0x00009C7F
IRQ Channel IRQ 16
I/O Port 0x000003B0-0x000003BB
I/O Port 0x000003C0-0x000003DF
Memory Address 0xA0000-0xBFFFF
Driver c:\windows\system32\drivers\nvlddmkm.sys (7.15.11.6371, 7.27 MB
(7,624,192 bytes), 17/09/2007 9:07 AM)

Thanks for your help,

Mike