Here's my brand spanking new suggestions for starting to troubleshoot a BSOD: http://usasma.vox.com/library/post/b...iminaries.html
Try these things as you can - and post back with the results of each (it's important).
You are missing a driver for the SM Bus controller on your system. This is either a device attached to your motherboard, or an attached card reader. Please install drivers for this device or disable it in Device Manager.
There are 30 minidumps from 7/23/06 alone - and bunch from other dates. They started in early June, and drastically increased yesterday. What did you do yesterday (the dump file is time stamped around 9:17 pm)?
Running the last 9 as I type this...