Figured it would happen sooner or later. I'd hoped to be posting more, but my little laptop finally said "Enough!", and wouldn't do anything until I'd overhauled the harddisk. She went from crashing twice a day to crashing immediately upon any startup.
She seems to be OK now, but I'm not going to celebrate until I have a week free of crashes.
Sigh. At least our air conditioner should be arriving today.