I installed Tiny 7 for educational purposes to my public laptop. The laptop is an old Toshiba Satellite L35. I downloaded Tiny 7 and burn an image to a data CD. The whole Window 7 installed in less than 15 minutes. My laptop responded snappier when opening up programs and surfer the Internet with FireFox and IE.
Try it out for educational purposes before you buy Windows 7.
http://www.davidtan.org/tiny7-tiny-w...ivated-iso-cd/