Member Avatar for cguan_77

hi guys, does any one encounter this problem. Win vista unable to detect a dhcp ip, but if manually configure the IP settings able to connect to internet.

any ideas why unable to detect dhcp ip? thank you.

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This thread illustrates a common Vista symptom: the NIC fails to obtain a DHCP lease while a manually assigned IP works. Useful suggestions in the thread included restarting DHCP-related services (), checking Microsoft support guidance (), and verifying router DHCP settings (). The issue was resolved by after resetting the Winsock catalog and rebooting the machine.

Why that helps: DHCP discovery uses the OS networking stack and Winsock-layer components. Corrupted Winsock entries, broken layered service providers installed by security/utility software, or misbehaving network filter drivers can prevent DHCP discovery packets from being sent or processed. A static IP can still work because it bypasses the discovery phase.

A compact diagnostic checklist that complements earlier replies:

  • Confirm adapter DHCP status and lease information using ipconfig /all.
  • Force a DHCP cycle with ipconfig /release followed by ipconfig /renew.
  • Inspect the System event log for DHCPClient or TCP/IP-related errors.
  • Ensure the DHCP Client service is set to Automatic and verify the router’s DHCP pool, MAC-filtering, or scope exhaustion; test another device on the same LAN to separate host vs. network problems.
  • Temporarily disable third-party firewalls, VPN clients and virtual adapters for testing; check Device Manager for driver flags and update or reinstall the network adapter if necessary.

Because the Winsock reset resolved the problem here, the root cause was most likely a stack-level or third-party filter issue rather than a simple router misconfiguration. Persistent recurrence should prompt a deeper check for interfering network software or malware and consideration of a full TCP/IP stack reset and driver reinstallation.

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Member Avatar for 110108

hi guys, does any one encounter this problem. Win vista unable to detect a dhcp ip, but if manually configure the IP settings able to connect to internet.

any ideas why unable to detect dhcp ip? thank you.

try to restar ur dhcp services from the services panel on vista or from the command prompt

net stop dhcpserver

net pause dhcpserver

net continue dhcpserver

Member Avatar for cguan_77

hi, thanks for your reply. tried to do it but still unable to detect dhcp ip. right now still doing the manual entry configuration of the ip ad, subnet, gateway and dns. :)

Member Avatar for Laser

Have you seen or tried ?

Member Avatar for altuin

Do you use a router? Maybe it has DHCP disabled so that your Vista machine does not have where to take the IP from. If you use a router you have to be sure that DHCP is enabled from the admin interface.

Member Avatar for cguan_77

thanks guys..problem solved..just did-> netsh winsock reset then reboot the machine

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