I recently had to reinstall Visio 2003 on my Win 10 machine - an older version of VSU worked just fine before this. After reinstalation, when I started Visio spawned a new Visio window every second or so. The only way to stop the accumulation of open Windows was to reboot. After some trial and error I found deleting the Super Utilities folder stopped the problem. I just downloaded and installed version 2.17.0.0 but got the same bad behavior. Again the problem stopped when I deleted the VSU folder. Any idea what is going on?