Canon PIXMA MP560 - Manual (Page 877)

Press the Alt key. On the File menu, select Run as administrator, and then click Server Properties....
When the User Account Control dialog box appears, click Continue.
Click the Drivers tab. In the Installed printer drivers list, click the printer to delete.
4. Delete the printer driver
When you click Remove..., Remove Driver And Package dialog box is displayed.
Select Remove driver and driver package, and then click OK.
In the confirmation dialog box, click Yes.
When data collection is completed in the Remove Driver Package dialog box, click Delete.
5. Click OK
The deletion of the printer driver is complete.
Important
You may not be able to delete the printer driver properly from the Installed printer drivers list.
If this happens, restart your computer, and try again.
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Page 877 of 949 pages Deleting the Unnecessary MP Drivers