I've not reinstalled windows at all, I think it's been on about 12 - 18 months, but it does seem to have got a lot slower than I'd normally expect from the gradual decline of a windows installation, perhaps I'll have to go back to the windows 95 way of doing things and do a fresh install at least once a year.
Coming back from sleep is instant, the log in screen is up before my monitor has woken up so that's fine most of the day, but i'd still like to improve boot times.
Thanks herbie, I'll have a look at that, I've actually been tempted to just get rid of AV completely.