Speaking of older piece-o-$#!* computers, mine just decided to crash and lose a half days work on the Devastator.
I saw it was slowing down, so I hit save.
Then it crashed.
Get it restarted, go to open up the file again: "File is corrupted and cannot be recovered".
At least it was just the Photoshop work. The model is still intact. I just lost all the work I did resizing, placing parts on the paper and the instructions.