| First of all, don't plug your printer in. 
 Go to canon's website, download the driver: for example
 
 Printer Driver Add-On Module Ver.1.10 (Windows 7/7 x64)
 aomwin110ea23us.exe
 1.10
 4.10 MB
 
 Just simply click on it, the program will run and unzip the drivers to window's directory (I don't know where, probably in windows/inf or system32). The PNP devices will search in these folders.
 
 Then plug the USB printer in, the window 7 will search for the installed drivers automatically for you.
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