It is probably starting as part of some application. I would, as a start, start up Windows Defender. In the 'Tools' tab, you are presented with several tools. Click on 'Software Explorer' and then make sure the presented dropdown box is set to 'Startup Programs'. Scroll down the programs on the left side and look for anything that looks like scanner software. If you find something that looks like a likely candidate, select it (click on it). You will be presented with the manufacturer and if you find that it is from ScanSoft, simply 'Disable' it with the button at the bottom and reboot.
If this solves your problem, you should look for a better way than a simple WD disable. Run the application and see if there is a configuration setting within the application that will turn off the startup with Windows. If you don't want the application at all, use the application Uninstall or the Control Panel - Programs and Features utility to remove the application entirely. If all this fails, go back into WD and rather than the 'Disable' function, use the 'Remove' button. This does not remove the application but rather simply removes it from the startup stream.
Edited by chimo79, 18 November 2008 - 05:21 PM.