I believe a lot of surfers are looking for Windows Vista Serials or keygen. Like what I say it's possible to get a vista license or serial, a vista home edition or vista ultimate license for free online but you should be careful with the viruses and malwares. But here's what I recently come across which you will definitely like- "Windows Vista Ultimate Upgrade". It's not the vista serial or crack you are looking for but this is free and you might want to try this. There is a 30 day trial limitation. But based on reviews by those who have tried it, it's worth their penny.

The Windows Vista Ultimate Upgrade only requires that you have:

• Windows XP Home/XP Pro/XP MCE/XP Tablet PC, 800MHz CPU, 1GB RAM, 30GB hard drive with 20GB disk space, DirectX 9 capable processor (Pixel Shader 2.0 for Aero experience)

You can get it here- Download.
Note: I don't host the files. It's from CNET. Enjoy!