I would never buy a machine that wasn't provided with full disks of all installed software. I can't understand how commercial manufacturers get away with it. Untold problems are caused by recovery disks and such like, plus the fact that many machines nowadays aren't provided with even a recovery disk.
Perhaps I am lucky in having my machines built to contain what I want - hardware and software delivered together with all the disks used. I can't imagine doing anything else, even if I had to build myself.
The information in my machines is far too valuable for some footling peccadillo like you describe to cause such havoc and potential loss.