Lose wireless internet when printer is on.
the only thing that connects the printer to the internet fault is the fact that the printer and your belkin are both usb connected.
If you are using a laptop then it could be a usb power problem and the motherboard is disconnecting the belkin adapter for some reason, the only one i can think of is a power problem.
The same can apply to a desktop pc if there is a usb problem
Firsly i assume you are using the belkin software to connect the usb adapter to the router, so on your taskbar on the right there is normally the little aerial type icon for the belkin adapter and a little pc screen showing the connection also, if you right click on one of theses icons you should get a line reading 'enable windows WZC', if you do get the option enable it and try using the windows connection software instead of the belkin as it may stop the disconnecting.
Also ensure that when you installed the software to your printer your firewall and antivirus was dissabled as certain elements to the driver may not have been installed.
Lasly, try using different usb ports if you have spare ones, with both the printer and the adapter as sometimes the chip on the board may be instructing the usb ports incorrectly as to which is required first, as windows asks for certain things eg input/output ports to be used first,in other words the IRQ (interupt request) may be causing the problem.