Vista gets a bad rep but its not all that bad really; once you've updated it and what not.
How about you just add more ram to the system? Thats really the best option, and memory is very cheap. Sound like your computer only has 2 or 4gigs of ram, should really consider upgrading it. What computer do you have?
I think it has 4 gb, I don't know, it's not my computer but I have to use it too while I'm visiting family. It's an acer. I personally wouldn't want an acer. But my good friend Nero helped me with my problem so the computer is working fine now! Thanks for replying here though.