we purchased another Windows 7 Professional SP1 32bit (Full) System Builder DVD 1 Pack, for our other two computers. After having experienced the horror of Vista (we had to reboot our computer and downgrade to XP Professional), Windows 7 is a pure dream.
It was easy to install and it seemed to give our computer an extra boost. It use to take 3-5 minutes for the desk top to pull up, now it takes about 45 seconds to a minute. Nice - very nice.