You *CANNOT* use a USB ADSL Modem with a Router. What you require is a combined "Router & ADSL Modem" which replaces the USB Modem and connects directly to the phone line.
If the Belkin Router is a "Cable/DSL Router", with an ethernet WAN port, then you have the wrong type of Router. It is suitable for use with Virgin's *CABLE* broadband service.
Windows 10 Home vs Windows 10 Pro comparison: Here are the extra features you get in the Pro version