Sorry about all the following questions but they may help.
What version of Windows on the Envy?
Did you install the Canon drivers and software on the Envy?
Do you have file and printer sharing enabled on the Envy?
If you just select to print a document the Envy does the resulting dialog list a printer in a pull down menu where you can select a printer?
Does the Canon printer show in Devices and Printers from the Control Panel on the Envy?
Hopefully sboots will see this as he is much better at networking than I.
And welcome to the forums?
How did you find us?