My 2 year old Tivo box is slow without any games or apps, i.e. just TV functions. It used to be fast, but after an upgrade the box seemed to slow down. It is now so slow that going into the kitchen to put the kettle on sometimes finds it still thinking about what to do next. You have to really want to watch something of the disc to be bothered to wait. I always keep by disc less than 25% loaded. Not quite unusable but I will not be renewing my contract unless it improves.
Thank you for your suggestions. I didn't wan to reboot as I assume I'd loose all my recordings and future pre-planned recordings - I'm a rugby fan and the world cup is on. So I decided before taking this step to just switch off at the mains. Bingo, my "old" Tivo is back, a remarkable transformantion. Looks like the IT Crowd are right! Cheers Colin