Windows & BSOD · medium

How to fixWU-0x80244018

Windows Update Error 0x80244018

What this error means

WU-0x80244018 is a medium-severity Windows operating system problem. Connection to the Microsoft update servers is blocked, usually caused by custom proxy servers, custom firewall rules, or stale DNS resolver cache settings. The steps below are ordered to resolve this efficiently.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Disable proxy server options under Windows Internet Settings and use direct connections.

Disable proxy server options under Windows Internet Settings and use direct connections..

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Reset the TCP/IP stack and flush the local DNS resolver cache to clear route blocks.

Reset the TCP/IP stack and flush the local DNS resolver cache to clear route blocks..

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Temporarily disable custom third-party firewalls and use the default Windows Defender Firewall.

Temporarily disable custom third-party firewalls and use the default Windows Defender Firewall..

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Incorrect proxy configurations blocking the Windows Update client from accessing external hosts.
  • Third-party firewall settings blocking outgoing connections on HTTP port 80 and HTTPS port 443.
  • Stale DNS cache directing the update client to outdated Microsoft Update server IP addresses.