The SolidWorks System Requirements page has been updated for the upcoming release of SolidWorks 2010. The Operating System changes include the following:
1) Adding Support for Windows 7 - SolidWorks products will run on Microsoft Windows 7 operating system starting with the 2010 release. Microsoft’s published shipment date for Windows 7 is Oct 22nd. Thus, the earliest version of SolidWorks 2010 products that can run on the Windows 7 operating system will be SP1.
2) Windows XP - Microsoft officially retired Windows XP in April of this year. SolidWorks 2010 will be the last release to support both 32 and 64 bit versions of Windows XP. SolidWorks 2011 products will run on Windows Vista and Windows 7 (32 and 64 bit versions) only.
For details, visit http://www.solidworks.com/sw/support/SystemRequirements.html.