OK, so I have a new 15" i7. Installed 32-bit Windows Vista Ultimate (already had a license, so that's why I've got 32-bit and not 64) and it only recognizes a little over 2.2GB of my 4GB of RAM. I tried XP Pro. (32-bit also) and it did the same thing. Has anyone else seen this? Is there anything I can do (other than get and install 64-bit)? Thanks!