Release / Renew IP:
Expired IP addresses or other issues with a computer's current IP address lease are often the reason for network connectivity issues. When you type "ipconfig /renew" into the command line, that command orders your DHCP client to renegotiate an IP address lease with the DHCP server on your router.
This will either renew your current local IP address with the router or get your computer a new local IP address if the router hasn't already re-assigned the current address.
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