That depends on which version of windows you're trying to emulate. Win95 and 98 worked speedily enough, but anything beyond that would bog qemu down considerably, including a full install of linux. (I built my own disk images and installed the oses in each image.) The only thing I wasn't able to do in qemu is format a floppy disk without it crashing. The workaround would be to get a real floppy and dd it to an image, and that works just fine. That's that extent of what I've done so far with qemu.

Durand