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kb5009543

About this tag
The kb5009543 tag covers discussions about the Windows 10 and Windows 11 security update KB5009543, which caused L2TP VPN connectivity issues for many users. Affected users reported that after installing this update, they could no longer connect to work VPNs using L2TP protocols. Some attempted to remove the update to restore VPN functionality, but removal did not always resolve the problem, especially after upgrading to Windows 11. Workarounds such as using a third-party VPN (e.g., Norton VPN) to initiate the Windows VPN connection were shared. The tag includes troubleshooting steps and user experiences related to this specific update's impact on VPN connections.
  1. J

    Windows 11 Windows Update (KB5009543, KB5009566) Removal after Updating to Windows 11 Issue

    I seem to have the same L2TP VPN issue as everyone with the security updates (KB5009543, KB5009566) but I upgraded to Windows 11 right after the update and now removing the updates is not helping me to get back on the VPN. The only way I have found to use the Windows VPN is to turn on my Norton...
    • JGF
    • Thread
    • issues kb5009543 kb5009566 l2tp norton removal security troubleshooting update vpn windows 11
    • Replies: 1
    • Forum: Windows Help and Support
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