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Zitat
I then used USBDeview to find out what USB device has been used on the computer and I saw 2 imaging device! Julie told me that it is an old printer which she no longer uses. I thought maybe the old scanner drivers conflicts with the new one. I uninstalled both scanners and then try to install only the Canon MP600 printer drivers. When it comes to installing scanner drivers, it fails again with the error code 19.
Finally I found that the problem is caused by a LowerFilters key in the registry. Go to Start > Run and type regedit. Navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{6BDD1FC6-810F-11D0-BEC7-08002BE2092F}
At the right pane, you should see a name LowerFilters with the data lvmvdrv. Select that name, hit the delete key and select Yes when asked if you’re sure you want to delete this value. Reboot the computer and you should be able to scan now. It is also possible that you see the data name LVUSBSta instead of lvmvdrv. Deleting that would work too.
I read that this problem will occur after uninstalling Logitech’s QuickCam software and drivers, all imaging devices (cameras, webcams, scanners) no longer work in Windows. Performing the above fix effectively disables the Face Tracking (PTZ) feature. Since the Video Effects feature also utilizes this component, it will be disabled as well. Seems to me that Logitech drivers doesn’t remove itself thoroughly during uninstallation. Let’s hope Logitech will be aware of this and fix this problem.
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