Check: Disconnect the USB cable, then uninstall and reinstall the ScanGear(scanner driver) and MP Navigator EX.
Step 1: Uninstall the ScanGear.
See "Deleting the Unnecessary ScanGear (Scanner Driver)" for details.
Step 2: Uninstall MP Navigator EX.
From the Start menu, select All Programs > Canon Utilities > MP Navigator EX 4.0 > MP Navigator EX Uninstall.
NoteIn Windows 7 and Windows Vista, a confirmation or warning dialog box may appear while installing, uninstalling or starting software.
This dialog box appears when administrative rights are required to perform a task.
If you are logged on to an administrator account, click Yes (Continue or Allow in Windows Vista) to continue.
Some applications require administrator account to continue. If you are logged on to a standard account, switch to an administrator account and start over.
When a confirmation appears, click Yes.
When uninstallation is complete, click OK.
MP Navigator EX is uninstalled.
Step 3: Reinstall the ScanGear and MP Navigator EX.
Insert the Setup CD-ROM into the computer's disc drive, then select Custom Install and reinstall the ScanGear and MP Navigator EX.