If you elect to install both applications side-by-side, you must download the 32-bit version of SharePoint Designer 2010, and install it after installing SharePoint Designer 2007. Please also note that 64 bit Office applications will not run if SharePoint Designer 2007 is installed; 64-bit Office 2010 applications should only be used if not connecting to SharePoint 2007 servers. Computer and processor: 500 MHz processor or higher.