A friend had a machine with Windows 7 on it (might have been retail). Anyway it received the free upgrade. However the other day the PC would not boot and the drive looks like it's toast as we tried it in a USB caddy in another machine and it's not recognisable.

Can buy a new drive but I guess now he has to purchase Windows 10? We have no licence information since it was an upgrade and we can't even deactivate it on the old machine.

Pity it didn't happy when Windows 10 upgrades were free :-(