If you are unable to uninstall ActivDriver, disconnect all Promethean devices from your computer and follow the instructions below.
Click the ActivManager icon and select Quit.
Right click on your taskbar and select Start Task Manager.
Select the Processes tab.
If any of the following processes are listed, select and click End Process for each one.
Close Task Manager.
Browse to C:\Program Files\Activ Software and delete the ActivDriver folder.
Browse to C:\Windows\System32\drivers and delete the following files:
Restart the computer.