First off, sorry for.wrong area mods but as you know if it was posted in the computer room id have no chance of a possible answer!

Seem to have an issue with my desktop connecting to the internet... Or rather not connecting!

Worked fine on sat night, won't connect Sunday and hasn't since. Plugged the network cable directly into the modem and it works, plug back into the router and it won't connect? The other computer that is hardwired from the router works fine so swapped the cables and still no joy? Im stumped?!?! Any ideas peeps. As its driving me bananas!