Hi Forum, I'm curious about minimal size requirements of the system partition. I'm running XP from a SATA RAM installation (Gigabyte i-RAM, to be exact), and its 2GB size are plenty of room for XP. [XP installation took about 12 minutes, boot time now is exactly nine seconds (after P.O.S.T.), making a backup or restoring an image of the system drive takes exactly 15 seconds (because my data hard drive is so slow and the rest of the OS behaves, well, just like if everything always were kept in RAM (what it is ] Programs and Windows\Installer folder are on another hard drive of course. So, what is the least partition size that I could fit Vista into? Thanks, David.P