There[SQ]s no known widely used or established software or application called "Dissy" for Windows. It[SQ]s possible :

*

It[SQ]s a typo:

Perhaps you meant a different name. Could you double-check the spelling or provide more context (e.g., what it[SQ]s supposed to do)?
*

It[SQ]s a very niche or obscure program:

If it[SQ]s a highly specialized tool or only used within a small community, it might not have a large online presence.
*

It[SQ]s a newly developed program:

If it[SQ]s very recent, it might not have gained widespread recognition yet.
*

It[SQ]s internal software:

It might be a program used within a specific company or organization and not publicly available.

To help me find what you[SQ]re looking for, please provide more information.