Techradar posted an article about making old games work on Windows 7

Getting old games running should be easy. Those old system requirements? Irrelevant! The tools at our disposal? Endless! We've got virtual machines and emulators and online fan projects and - cough - eBay access to damn near everything ever released and everything else we could ever want. Indeed, 90 per cent of the time, getting an old classic up and running is a piece of cake. Sod's law being what it is, though, the game you really want to play will usually land in that fiddly other 10 per cent, and when that happens, you're on your own. Well, no longer. Over the next few pages, we'll show you how to get almost any old game back up and running on your PC, starting with simple 'just work, please' instructions to DOSBox, and scaling up to deal with the Four Horsemen of Incompatibility: Windows, QuickTime, DirectX and 3D. We say 'almost', because unfortunately some games just won't play ball. If you want to be absolutely, positively certain, you don't have much choice but to head to eBay and actually hunt down or put together a new system using decades-old technology.

  Tutorial: How to make old games work on Windows 7