Is it really worth installing windows 7 ultimate or professional is sufficient for a home/student user? The only extra features i can compare prof. with ultimate is the encryption and the other useless feature. I never used those two features in vista ultimate, except the dream scene. If i install Professional ver. will the ram resource be less compare to ultimate? All the features i need are in professional except those two extra. i am kinda skeptical about it. unless there are some hidden features or things to come forth, after the october 22 launch date..?