You need a 64 bit CPU. It's possible you DO have that, but running a 32 bit OS. You also need enough RAM. I did some research on this last year when Win7 shipped and determined that you need at least 6 Gig RAM to make running 64 bt Windows worth it.


>I got on this road because I could not get SQL to install. I tried SQL Server and then SQL Express. When I downloaded SQL Express
>and tried to run it, I go "Not a valid Windows application". After tinkering I found out that my Laptop is 32 bit. So I then downloaded
>SQL Express 32 bit and it installed fine. But it got me thinking....