I believe there are issues with Belkin adapters. My advice to you is to connect to the internet using an Ethernet (wired) connection from your machine to the router and follow the guidance here:
http://askubuntu.com/questions/394159/b ... untu-12-04I am aware that you have the N300 but the procedure will be pretty much the same. If you boot into live mode and it recognises 'wireless networks available' your device is going to work - but I am erring on the side of caution here. If it does not get picked up in live mode you will need to follow the procedure in that thread link I have given above.