1. Restart the modem after 20 sec restarts the Belkin wireless router.
2. Do not wait for the second time and wait for it. 2. Sometimes it's your firewall that blocks internet connection. Please check and update the antivirus.
3. Make sure the time and date are correct on the computer.
4. Go to device manager and update LAN and wireless adapter.

belkin n300 range extender setup | belkin wifi extender n300 setup | belkin n300 range extender setup