We've never had any trouble with these regular updates before, they just load up when you shut down your 'puter.

For the last couple of weeks, however, it's been trying to do an update which doesn't. It just says don't switch off, it will shut down automatically when it's run, but even if we leave it for hours and hours it doesn't finish. We have to power down, then next time we switch on it has to do an error check first.

What's going on? And what can we do to sort this out? We've run disc scan and defrag, which didn't throw up anything, although the defrag took a long time.

We're not very technosavvy, so answers in words of one sill a bull please.