WS stands for Web Services on devices for printing, this service is provided by Microsoft. Uninstalling / reinstalling the printer driver should install the correct Printer driver.
If you need more immediate assistance, please contact our support group: http://bit.ly/ContactCanon
Please click HERE to open the support page for your Canon printer. Once the page opens, select the drivers and download tab.
You will want to download and install the first option listed which is MX920 series MP Drivers Ver.1.01. This will install the Canon printer driver on your computer.
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