content: Solidworks and Altium, two of the most popular mechanical / EDA packages known to man aren't yet Win10 compatible.  I simply cannot upgrade my 8.1 box until they are, and that assumes I want to upgrade at all.  Thankfully I intercepted and removed the nagware / forced-update-ware.    M$ not only has no respect for their customers, they have absolutely no fucking idea how people use their software.  An OS is not just another application.  It should not be updated every other week.