hi, i was just about to go to the store and buy Windows Vista because of all the great things i heard about it when it hit me. I didn't know if i meet the requirements. I have a: Compaq Presario S4100NX 2.5 GHZ 256 mb 80 GB hard drive have internet, dvd drive, and everything. I pass everything with flying colors except for the 256 mb i need 512. Is their any way in which i can still run it.