I have AVISynth installed and DGIndex appears to work, although it makes everything else black when I run it, the desktop can be restored easily. The problem is VirtualDub. It's fine as long as I don't open anything, but once I open it the emulated Windows desktop goes black and stays black. I have tried a multitude of settings, none of which improve things. I have to kill the terminal that I ran Virtualdub from to close the virtual desktop.