Advanced Guide > Troubleshooting > Problems with Scanning > Scanner Does Not Work After Upgrading WindowsS911Scanner Does Not Work After Upgrading WindowsCheck: Disconnect the USB cable, then uninstall and reinstall the MPDrivers and MP Navigator EX.Step 1: Uninstall the MP Drivers.See "Deleting the Unnecessary MP Drivers " for details.Step 2: Uninstall MP Navigator EX.1. From the Start menu, select All Programs > Canon Utilities > MP Navigator EX 4.0 > MPNavigator EX Uninstall.NoteIn Windows 7 or Windows Vista, a confirmation/warning dialog box may appear wheninstalling, uninstalling or starting up software.This dialog box appears when administrative rights are required to perform a task.If you are logged on to an administrator account, follow the on-screen instructions.2. When a confirmation appears, click Yes.3. When uninstallation is complete, click OK.MP Navigator EX is uninstalled.Step 3: Reinstall the MP Drivers and MP Navigator EX.Insert the Setup CD-ROM into the computer's disc drive, then select Custom Install and reinstall theMP Drivers and MP Navigator EX.Page topPage 929 of 1037 pagesScanner Does Not Work After Upgrading Windows