>>Hi All. I know that VFP9 runs under Windows 7 64 bit but must the user choose/set anything special like a compatibility mode or something for an AMD 64bit CPU ?
>
>My advice is don't go to 64 bit unless you have to. I ran into many more problems than I expected to. Who needs trouble from the OS? If there is a performance gain, which there is supposed to be with 6 GB of memory and up, I haven't noticed it.

What problems?

I find 64bit Win7 is fast and stable, and it allows a lot more RAM.

All my development machines run it.