Internet connected but not working [Closed]

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Hello,

I've a TP-Link router and my desktop connected by LAN. It showing internet access but not working properly and connection speed showing 10 Mbps(can't change speed and duplex). But when I directly connected it working properly.

Router has configure correctly, because I've 3 desktops. Remaining two are working properly.

Kindly help me...

Regards,

Deb Dweep