It’s alive! My desktop computer, that is. It’s been fitted with new and more capacious memory which Robbie the Computer Guy assures me will stop those pesky blue screens.
(Well, unless it’s not the memory but the motherboard, in which case it’ll need more bits taken out and replaced.)
Still, the wretched thing seems to like Robbie - it actually loaded Windows for him, which is more than it would do for me - so maybe now it will behave. Certainly Firefox has stopped hanging, so that must be a good sign.
Edited to add: It wasn’t the memory ... or at least not only the memory. But it took two and a half hours to crash this time, and it restarted afterwards, so it’s definitely improving.