I have windows vista 32bit oem. I had it installed on my old computer, then a friend installed 64bit vista for me on that computer. A while ago I sold my PC with the windows vista 64bit on it and bought a new i7 rig. I plan to install the old vista 32bit oem (I have the disc and product key) on my new computer and then buy an update version for windows 7. But the two questions I have is will the 32bit oem install on my PC even though it was installed on a different PC that was pre-paid/built and can you use windows 7 upgrade version on the 32bit oem assuming it works.