Just a comment - I was thinking about buying a new PC because my 2.5 year old Dell Core 2 Duo with Vista (3 gigs ram and 2.2Ghz, approx. 2600 books) would not run Version 4 - it kept freezing and closing. . .I decided to try to upgrade the existing PC first. I upgraded the BIOS, then did a clean install of Windows 7 Professional 64 bit - I eliminated EVERYTHING except MS Office and IE explorer and whatever else installs with Windows 7, and am VERY pleased with the results. Everything works quite well. I have some extra RAM on order and think that it will improve things even more! In general the computer works a LOT better on 7 than it did on Vista. I am not sure if I can attribute that entirely to the operating system upgrade, or perhaps to 50 Gigs of extra hard drive space that I am leaving open by making this my Logos computer and nothing else. . .Anyway - thought I would pass that along.
I did some research on Dell's website on upgrading to 64 bit and followed their directions. . .The BIOS upgrade seemed to be the key to making it all work.