A few things to check before you throw it out the window change the channel to 5 which is mid range. If you have a DEC phone turn it off for a wile to check it’s not your phone causing interference. One other thing to try is let windows control the wireless connection. Lastly don’t buy a new unit phone the help line and get it RMAed Belkin normally ship a replacement and then get you to send the old unit back.
I have the same unit and have no problem and I’m using a 6Mt cable from the modem to the router which I understand from Belkin this could cause the router to loose the connection.
Hope you get it sorted