I think you need at least 1GB of RAM to run Vista.
Wow! that is sad. KDE 3 in Kubuntu Linux runs perfectly fine, and fast, with 512MB of RAM. You can even run KDE 4 with 512MB RAM.
I don't think I'll ever get vista, it's just too expensive and too buggy.
Good idea. Every expert agrees not to get Vista becasue if its massive requirements, security holes, stability problems, and bugs.
Personally, I just tell everyone just to use Linux. Fewer bugs, more stability, no viruses, no spyware, less requirements, and you don't need to worry about lawyers and copyrights as much. It is just much more simple, especially for the casual PC user.
Edit:
i prefer ubuntu (linux distribution) but how i cant install my wireless internet i use windows
I'm the opposite. My wireless card installed perfectly in Kubuntu 7.10 while will not run properly on windows. Actually, win xp screws up my wireless router every time I try to connect.
Have you tried using Ubuntu or Kubuntu 7.10? It haves an automatic proprietary driver install for things like video cards and wireless cards.
Edit:
But since I'm a gamer by heart, I'm all for Windows.

It was build with extensive support for gaming, graphic and sound. ^^
Windows haves no more support for games then any other operating system. It is just as easy for a company to make a game for Mac, windows, or Linux. Many game manifacturers simply choose wondows because more people use it, and becasue M$ encourages the companies to have windows only games. Several companies make games also for the Mac and Linux. ID software, for instance, is very Linux friendly and releases all their games on Linux.