Do you have plenty of installed memory?

Yep, it's a D630 which I've pretty much maxed out. Not an ideal platform, I know, but if anything it should be slow rather than unstable. I've had a few different error messages on it, but the latest one is



Microsoft Visual C++ runtime Library

Runtime Error

(Path to Inventor.exe)

Abnormal program Termination



There are no errors in the log files for this time period and there is nothing obvious wrong with the machine, the last time that this happed the machine was siting idle with Autodesk open, though it has also happened while it has been in use. It's only ever unstable with Autodesk/autoCAD. I've reinstalled the softweware several times, I've installed it on several different machines (All D630). I've used known good images of D630 that are perfectly stable on every other machine (The ones witho-ut Autodesk), and also I've personally rebuilt the machine by hand from first principles. I know that the built is good, but the something is causing an instability and I don't know what.

I would run the Dell diagnostics on the hardware.

Yeah, I second the diagnostics option (F12 at the Dell splash screen and select Onboard Diags, or boot from the Dell Resource (aka Drivers & Utilities) CD).  At the least find a copy of memtest86, or a similar test to verify it isn't a memory failure.  I like memtest86 as it also tests the cache in the CPU and not just the RAM.