Thanks, Stevea. Tried loading F7 on the dual-boot machine last night (UK time) but suddenly got stuck on loading grub and chickened out.
I absolutely DARE NOT lose the Windows partition, dammit! Husband is a total technophobe and only just
knows how to turn the computer on, let alone anything else. But I will try what you have suggested - keep your fingers crossed for me please
(p.s. - I'm replying to this from my other
machine - the one that is F7 only - mine, mine, mine!