Is the desktop board DH57DD compatible with Windows 7 Professional 64-bit and 32-bit editions?
Look at page 11 on "Intel Desktop Board DH57DD Product Guide", which is available at
This product guide indicates that DH57DD supports Windows 7 Home Basic, Windows 7 Home Premium, and Windows 7 Ultimate. However, Windows 7 Professional is missing on the list of Supported Operating Systems there.
On the other hand, look at the compatibility table at
This compatibility table indicates that DH57DD supports Windows 7 in general. This compatibility table does not say anything about particular edition within Windows 7 family.
So, is DH57DD compatible with Windows 7 Professional 64-bit and 32-bit editions or not?
First of all you need to understand what differences between Windows versions.
Board can't support Windows, Windows will support it thru drivers. If drivers for board will available for Win7 family, that is mean that you can use desired Windows version.