After reading this thread, I'm beginning to lean toward a different issue here.
Your computer ran the hard drive diagnostic tools from a boot disk with no errors or problems.
However it crashed while running it while Windows was running.
There seems to be an issue here that is not directly hard drive related.
We should now be looking at possible heat related issues or perhaps a setting in the BIOS related to whether the hard drive is set to PIO mode or UDMA mode. PIO is slower and UDMA is quicker and better. So the BIOS should be checked for these settings.
These settings would be found in the BIOS where the hard drives are listed.
Such as PRIMARY MASTER. Choosing the drive can display some options in another pop up menu.
Make sure UDMA is set to a number higher than 4. PIO should be 0 (Zero).
If heat is an issue here, the processor could be the culprit.
When was the last time this computer was checked for dust accumulation?
When was the last time it was cleaned out?
You can download two programs that will help you diagnose heat related issues.
I will include links to the programs download pages here.
If you use either program and notice the temperatures are a little hot, this is a clear indicator your computer is freezing do to heat and the time has come to do a thorough cleaning.
We may be looking at your RAM as an issue also, however, I prefer not to try to add too much to the list of possibilities until we cover the possibilities that I have already listed.
As for SMART, this is a hard drive's communication program that sends a message to the motherboard that hard drive failure is just around the corner.
This option can be be found in the same way I mentioned above to see if your hard drive is set to PIO or UDMA mode.
The PRIMARY MASTER should have a pop up menu with the option to enable the SMART feature.
Please keep us updated, so we can continue offering possible solutions.
Edited by MrBruce1959, 02 November 2010 - 12:10 PM.