temps look fine
Next try step 2 on that thread and look for some messages in your event log.
If there is nothing being reported there, then next try testing your ram. Download memtest here:
www.memtest.org
You want the: Download - Pre-Compiled package for Floppy (DOS - Win) version.
Unzip the file onto a floppy disk, and put it in your floppy drive. Reboot your computer and the software should automatically load up. Let it test your ram for a few hours (6 or 7 passes).