I just updated to a Win7 64 bit machine and haven’t loaded CK19 yet but have read on the Cadkey forum that it will run fine. You may have to run it in XP compatible mode on some hardware. Some of the CDE programs, like Dynamouse may not work but it sounds like you won’t need that for legacy files. KeyCreator 10/2011 runs great on a 64 bit machine with SSD. Any licensing issues can easily be address through their website if you have proof of ownership.