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I found this in a few different places around the 'net - hopefully it's helpful:

Renew and Release IP Addresses

You can use the command-line tool IPCONFIG to get network information such as your IP address and to perform other tasks for troubleshooting network issues.

However, if you prefer a graphical user interface over command lines, you can download a GUI tool that will run on Windows XP and Windows 2000. The tool that?s installed is Wntipcfg.exe.

The tool identifies your IP address, subnet mask, and default gateway for each of your network interfaces, including the interface for your network adapter, your dial-up networking interface, and your PPTP interface. It allows you to click a button to Release, Renew, Release all, or Renew all when configuring an IP address.

To download and install the tool:

  • Open the Windows 2000 Resource Kit tool download page Wntipcfg.exe: Windows NT IPConfig Utility
  • Click the download link in the box at the top right corner of the page.
  • In the File Download dialog box, select Save this program to disk.
  • Select a location on your computer to save the file, and then click Save.
  • In Windows Explorer, go to the location where you saved the downloaded file, double-click the file to start the installation process, and then follow the instructions.

To provide quick access from the Run line, install the program to C:\Documents and Setting\yourusername or the equivalent. Or, create a shortcut to the program on your start menu or desktop.

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  • Latest Post Latest Post by Don Gino

Dani AI

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As and point out, Windows provides both a GUI option and a command-line method to drop and re-request a DHCP lease. The notes below fill gaps often missed by quick fixes and show what to try when a simple refresh does not restore connectivity.

  • Confirm the adapter is set to obtain its IPv4 address automatically. If a manual (static) address is configured, a DHCP refresh will not change it.
  • Check the physical and link layer first: cable and switch port, link LEDs, or Wi‑Fi association/SSID and MAC filtering on the access point. Hardware faults and unplugged leads are surprisingly common.
  • Use the adapter disable/enable sequence from Network Connections to force a rebind without command-line tools. Also try restarting the DHCP Client service (Services.msc) before more invasive steps.
  • If the network is managed, inspect DHCP scope usage and reservations (scope exhaustion and duplicate/static‑address conflicts are typical causes). On corporate networks look for port security, 802.1x, or MAC‑based restrictions that can block a new lease.

When local fixes fail, repair the TCP/IP stack and Winsock catalog from an elevated prompt and then reboot (this will interrupt network access, so avoid on remote sessions):

netsh int ip reset
netsh winsock reset

After reboot, check the System event log for DHCP‑Client errors and update or reinstall the NIC driver if needed. For virtual machines, verify the hypervisor networking mode (bridged vs NAT). Finally, exercise caution on production or remote systems: resetting the stack or toggling adapters can sever connections and require console access to recover. The GUI and quick refresh that started this thread are useful first steps; the checklist above covers the common deeper causes and safe next actions.

Member Avatar for Don Gino

Yea if you want to disconnect from the network, in command prompt type in "ipconfig /release", and if you want to renew your IP address (sometimes there are clashes and errors with DHCP, rare) type in "ipconfig /renew". Typing "ipconfig" gives you your network IP details.

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