VPN client stopped working after last night Windows update
Cumulative and feature updates regularly break VPN virtual adapters. Especially older clients (legacy AnyConnect, GlobalProtect) on Windows 11.
support/vpn-thuiswerken/vpn-crash-na-windows-updatesteps: 5
Try this first
- Check Device Manager > Network adapters. A yellow triangle on the VPN adapter points to a driver that did not survive the update.
- Uninstall the VPN client fully (Programs and Features, or installer /uninstall). Reboot.
- Reinstall the latest version of the client, not the one you had. Vendors usually ship a fix-release a few days into a Windows cycle.
- Still broken, check whether WinTUN or WinTAP is properly registered. WireGuard and some clients ship a separate adapter installer.
- If nothing works, roll back the Windows update via Settings > Windows Update > Update history > Uninstall updates. Temporary, the update returns.
When to bring us in
Whole department locked out after patch Tuesday: tell us, we push a new client version via Intune for the group. Beats 12 people calling separately.
See also
- VPN will not connect or keeps droppingTwo main causes: your home internet or the VPN server. One quick test separates them.
- VPN connects but corporate folders are unreachableConnection says "green" but your network drives will not open. Almost always a DNS or routing issue.
- Home PC slow on VPN, fast at the officeThree suspects: home internet, VPN server limits, or routing that takes a long detour.
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