There is no means to update from SP3.0 to SP3.1, because + k X9 }8 ?9 o# J5 S% Z% d ! M4 B! Y/ s& T5 Q: o& k( F"Please note that the only difference between SolidWorks 2008 SP3.0 and SP3.1 is production support for Microsoft Windows Vista 64-bit, so it is not necessary for customers on other operating systems to download this Service Pack. "