RF Keyboard 1.0

Question

hi could you plz help me on a problemi recently just bought an advent brand keyboard (RF Keyboard 1.0) its silver and im trying to uninstall it but it says unInstallShield has detected that C:Program FilesSlim Multimedia KeyboardMagicKey.exe is still in use.Please close this application using this file and launch unInstallShield again.But i dnt no how to close the application...i tryed deleting it but it said Cannot delete MagicKey: Access is denied. Make sure the disk is not full or write-protected and that the file is not currently in use.