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I cannot get my Canon MX 452 copier/scanner to connect to my PC via Wifi. It uswed to do so until I changed to a new 8.1 desktop. I've followed the Canon  routine diligently. The info panel states "connected" but when I then scan I get "not connected...

I have a MX452 printer/scanner which was connected to my PC by Wifi. I have a new PC (8.1.) which will not connect. I used the Canon connect  instuctions (pages 5/10 in the manual) and the info panel on the printer duly says "connected" but when I sc...