If you just want a 30-second nostalgia hit without downloading anything, is a browser-based simulation using HTML5, CSS3, and JavaScript.

Once you complete your , maximize the experience with these finishing touches:

: The home of original desktop gadgets (clocks, weather, etc.).

But for pure visual nostalgia, a VM is overkill:

If you are looking to relive the Vista experience without the hassle of finding installation discs or dealing with driver incompatibility, downloading a "Windows Vista Simulator" is the most convenient route.

Several websites host JavaScript ports of old operating systems.