If you are very interested in installing multiple operating systems on your computer, but you don’t want to dual-boot, and risk losing all your files and folders, then try this. It is a free piece of software called Virtual PC by Microsoft. It emulates a computer, and you can install almost any OS you can find on it, and if you have something that you want to use but won’t work on Vista, then you could install XP, 98, 3.1 or DOS in order to let it run. If that software’s a game or requires a lot of heavy processor usage, then maybe you should get a computer with that OS instead of using this. It also works with Linux, but I have Windows Vista Home Premium, and it works perfectly! I will post photos of it soon. It’s free on XP and vista. If when you start it for the first time, and it says it won’t run on the OS, then check ‘don’t show this message again’.