For what it's worth (not much other than as a curious fact), under Windows 7 in XP compatability mode, if I set "tools->disable integration features", running the DOS fractint shows nothing, but after pressing F3, a fractal is indeed generated. Hard to use, though, without any text screens showing. Hmmm, might be possible to run a PAR file from the command line. Of course Rich's windows version does work nunder Windows 7 (albeit without mouse support). I have done very little with virtual machines. Just for my education I might try installing DOS or Windows XP itself under Virtual PC, or maybe VirtualBox. (later) Guess what, I tried Winfract (Jonathan's 16 bit version), and it does work, apparently just fine, on Windows 7 64 bit in XP compatability mode! This time the "enable integration features" setting didn't matter. Even the mouse works ... Tim