Can you get in into safe mode? The problem might be a BSoD, and your computer might be set to reboot automatically during crashes. I doubt the removal of a temporary file would have anything to do with this.
Set it to create a minidump file and then boot in normal mode. You should now see the most viewed image in the computer world, the BSoD. Go back in safe mode and post your minidump file here (you’ll also find instructions for how to get the minidump file). The developers will take a look at it as soon as possible (yes, computer programmers have a girlfriend/wife too ;)), so that they can figure out what the problem is, and then fix it.
There’s not much you can do yourself, except trying to do a complete uninstall and reinstall CFP3, and see if that solves the problem.
How do I attach the minidump file to my forum post? I see many guys have pasted-in a text file, but I don’t seem to have anything capable of translating the data file into plain text and don’t see any obvious button saying “attach file”! ???