Alternate way to remove Bonjour is to:
Start, All Programs, Accessories then right click on Command Prompt and Run as Administrator. Then type (with an Enter after each line).
sc stop "Bonjour Service"
regsvr32 /u "%PROGRAMFILES%\Bonjour\mdnsNSP.dll"
netsh winsock reset catalog
Then reboot. You can then delete the folder C:\Program Files\Bonjour if it is still there. Also C:\Program Files (x86)\Bonjour.
All I know about Dragon is what I see on the web but make sure you are looking in C:\ProgramData and not C:\Program Files
No need to delete the old files.
Windows is in Notification period error see:
Using ShellMenuView to disable non microsoft entries might be worth trying if you still have your mouse problem.