This document explains how to fix Microsoft Windows error code 80073718 or 0x80073718  if it is not working properly or throwing an error while installing, updating or upgrading Windows.

The error message may look like:
– Windows could not search for new updates. An error occurred while checking for new updates for your computer.
– Some updated were not installed. Failed: 58 updates – KB2797687,
Error(s) found: Code 80073718 Windows update encountered an unknown error.
– Update for Windows 8 for x64-based Systems (KB2820330)
– Windows could not check for updates automatically

This solutions applies for following version of Microsoft Windows:

  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Error 80073718 Windows Update Overview
Avg. Time to Resolve Issue   45 mins
Difficulty Very Hard
Log Name: MicrosofWindowsUpdateError1008.log
Source: Device-manager
Event ID: 4720
Operating System
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Level: System Error
User: Admin
  • Faulting Application Name: Window Update Manager , version: 1.8.4781.70762, time stamp: 0×85680826
  • Faulting module name: Windows  error.dll, version: 6.0.0851.45228
  • Exception code: 0xd02b736c
  • Fault offset: 0xb03c875c
  • Faulting process ID: 0×106
  • Faulting application start time: 0x800b0e14423560
  • Faulting application path: ~<userpath>
  • Faulting module path: ~C:\Windows\System32
  • Report ID: e2g56a52-6381-11g3-2559-3443bed3c692
Also Known as
  • WindowsUpdate_80073718
  • 80073718
  • WindowsUpdate_80073718e
  • 80073718e
  • 0x80073718
  • fehler code 80073718, foutcode 80073718, fejlkode 80073718, code d’erreur 80073718, codice di errore 80073718, feil kode 80073718, cod de eroare 80073718, código de error 80073718

Cause of 80073718 Windows Update Error Code

  • Port Blocked
  • System DLL files conflict

How to fix Windows Error Code 80073718

Step 1: Verify Windows Firewall Settings
1. Hold Windows Key + R and Enter Firewall.cpl
2. Press OK.

3. Click on “Turn Windows Firewall On or Off
Turn Windows Firewall on or off4. In Private network Setting, select “Turn off Windows firewall (not recommended)
5. Do the same for Public Network Setting.
Disable Windows Firewall6. Press OK.
Note: After the issue is resolved you must turn the Windows Firewall on.

Step 2: Check Proxy Settings

1. In Start Searchbox type “CMD” (without qoutes)
2. Click on CMD.
Office Resolve Error Proxy Check 3. In command Prompt Copy following commands (Simply select the command and press ctrl+c and press ctrl+v in command prompt)

 netsh winhttp import proxy source=ie 

Check Proxy Setting

Note: You will need Administrator Access to Run the above command. Simply Right Click on CMD button and select “Run as Administrator

If you get the message “Direct Access (no proxy server)“, continue to the next step otherwise disable proxy from Network Settings.

 You can contact our 24×7 Live support for any help during the whole process. 

In most cases Microsoft Windows update error 80073718 should be resolved by following above steps. If however the issue still persists it means there is some critical issue with your system which needs to be fixed manually and is recommended to be done by an experienced Computer Technician.

You can chat one-on-one with one of our Microsoft Certified Support Representative 24/7 by clicking on the Chat button.

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Last Updated: 26/02/2016
Solution ID: 301727

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  • April 13th, 2016

    Posted In: Microsoft Windows

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