I often hear about creating partitions on a HD for the OS, data and applications. The reason often quoted is that if you need to do a clean install then having the OS on its own partition makes it quick and easy and you can be up and running again in no time without any risk to your data. Well I can understand the loss of your data bit but with something like Acronis TI the risk is greatly minimized in any event. However, the up and running again quickly - really? Once you have installed the OS then comes all your programmes and applications. Even though you haven't lost them you will still have to reinstall them as they are integrated into your OS via pathways etc. these will have been trashed on the reinstall. It's the applications and programmes that take the longest to reinstall not the OS. Last time I did all mine it took the best part of a week before I had it all fine tuned again.