There are way too many versions of Windows Vista and choosing the one that's right for you can be tricky. It is, however, possible to try all of them out, for 14 days, to see which one you like best.

This article appears as part of the April 07 issue of PC Advisor, available now in all good newsagents

During setup, you'll be asked to enter a product key. However, if you don't enter a key and click No, you'll be presented with a list of all the Vista versions available. Intriguingly, every Vista install DVD is identical and it's the product key that determines which version is actually installed. So you can pick one from the list and use it for 14 days before it times out.