There is no means to update from SP3.0 to SP3.1, because / b3 b, b6 u4 S/ D7 U$ T ; ~ B& R* v' |; b) m |4 n"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. "