BE CAREFUL! - SolidWorks' Check for Updates finds 2013 Beta 1
Please be aware that the SOLIDWORKS 2012 Check for Updates seems to be able to find 2013 Beta 1 as an available update. SOLIDWORKS has confirmed that this was not intended.
Please call your reseller BEFORE updating to ANY major release change, it's worth the time to talk about the process, benefits, etc.
Jim K. – CATI Support