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You cannot have your printer connected to your desktop with a usb cable and also to your wireless network. It has to be one or the other, not both. However, you can turn on print sharing on your desktop and access your printer from your laptop wirelessly. The only requirements for this to work are that both your laptop and your desktop are connected to your wireless network, and your desktop has to be powered on and in an active state. Your printer does not have to have a wireless connection because your desktop computer acts as a wireless print server.
The printer drivers must be reinstalled on your laptop under these conditions. I can help your with this.