Me too. Windows 7, X64, crashes most times I turn the LFO amount knob, regardless of the patch. Sometimes it causes a constant tone to be output even after the crash, requiring a reboot to get rid of it. Pretty frustrating when working on a project.
It would be nice to hear from Arturia on this, although I'm sure it will be something along the lines of "Arturia Analog Factory does not officially support the Windows 7 operating system".
Its actually kind of funny, one of the reasons I decided to upgrade to an i7 machine was because I thought the power would help run analog factory better and reduce the crashes/bugs!