Windows keeps changing a specific PC to append specific DNS suffixes. Please help!!

Jack Salsbury 21 Reputation points

In a setup with 10-15 windows devices with an on-premises domain controller, group policy etc there is one computer that after a few hours has the radio button of "Append these DNS suffixes (in order)" selected with an old DNS address entered in the box below. The DNS has not been used for a while and I have no idea where it is getting it from.

Is there anywhere I can check to stop it constantly reverting back to this setting? I want the radio button to default to "Append primary and connection specific DNS suffixes". I've attached a screenshot of how I want the setting to remain.

Any ideas greatly appreciated!!!


Windows 10 Network
Windows 10 Network
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Network: A group of devices that communicate either wirelessly or via a physical connection.
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Windows DHCP
Windows DHCP
Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.DHCP: Dynamic Host Configuration Protocol (DHCP). A communications protocol that lets network administrators manage centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's network.
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  1. Dave Patrick 343.2K Reputation points MVP

    May be some group policy pushing them out.

    --please don't forget to upvote and Accept as answer if the reply is helpful--


  2. Jack Salsbury 21 Reputation points

    Thanks, unfortunately that did not work. I did see that in regedit under Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters the NameServer was showing the old DNS. I've removed this and rebooted however the DNS suffix is back again, but the reg key does not have this value anymore.