Hi John,
We have tested SUPER(C) on Windows Vista and it works.
May I ask you to provide more details about the problem you are facing.

John wrote:

I can run super

Would you describe it step by step:
1.drag & drop file
2.selection of codecs and settings..
3.Hit encode
4.Visual animation of the progress bar..

John wrote:

but can't output files. Why?

1.Are you logged as admin
2.is it a legally installed version of Vista (sorry to ask)
3.Did you Right-Click inside the GUI to open the Menu (As indicated in the upper title bar)
4.Did you try to select/modify using the "Select The Output Folder Destination"
Any additional details more than 1 single line are welcome.
Cheers.