Try this:
1. Open up the Windows Task Manager (Ctrl-alt-delete -> Task Manager).
2. In the processes, find Sound Typist, right click -> End Task, and wait a moment for it to die.
3. Download and run the PORTABLE version.
4. With the systray icon (or if the orange app window comes up), toggle the Start Sound Typist at Login OFF, ON, OFF to make sure it turns it off.
5. Reboot, and it should no longer turn on.
Alternatively, the registry settings are here:
Computer\HKEY_CURRENT_USER\SOFTWARE\SoundTypist\SoundTypist
- You'll want to set hidden to False so that it shows the orange app window, and startOnLogin to false also.
You shouldn't need to do this, but to manually remove it from starting at login, edit this registry:
Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- Delete the SoundTypist entry in that registry