This document explains how to fix Microsoft Windows error 8000402 or 0x8000402 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: 75 updates
Error(s) found: Code 8000402 Windows update encountered an unknown error.
– Microsoft Security Essentials couldn’t download definition updates because your computer is using and older version of the windows update client or because windows couldn’t start the service transfers data.

This solutions applies for following version of Microsoft Windows:

  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Error 8000402 Windows Update Overview
Avg. Time to Resolve Issue   50 mins
Difficulty Critical
Log Name: MicrosofWindowsUpdateError4533.log
Source: Device
Event ID: 5567
Operating System
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Level: System Error
User: Admin
Description:
  • Faulting Application Name: Window Update Manager , version: 5.5.7319.00019, time stamp: 0×84578759
  • Faulting module name: Windows  event.dll, version: 8.4.3396.79388
  • Exception code: 0xc01d298e
  • Fault offset: 0xc04f237a
  • Faulting process ID: 0×858
  • Faulting application start time: 0x800d3a51893639
  • Faulting application path: ~<userpath>
  • Faulting module path: ~C:\Windows\System32
  • Report ID: e4b83c64-2279-36a1-2425-2139aeb2g332
Also Known as
  • WindowsUpdate_8000402
  • 8000402
  • WindowsUpdate_8000402e
  • 8000402e
  • 0x8000402
  • fehler code 8000402, foutcode 8000402, fejlkode 8000402, code d’erreur 8000402, codice di errore 8000402, feil kode 8000402, cod de eroare 8000402, código de error 8000402

Cause of 8000402 Windows Update Error Code

  • System is infected with Virus/Adware
  • Temporary Internet files location is infected with active malware

How to fix Windows Error Code 8000402

Step 1: Disable Proxy

1. Press down Win Key + R and Type “CMD” (without quotes)
2. Hit Enter key
Office Resolve Error Proxy Check 3. In command Prompt Copy following commands (Simply select the command and hold ctrl+c and press ctrl+v in command prompt)

 netsh winhttp show proxy 

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. 

Step 2: Check for corrupt system files

1. In Start Searchbox type Cmd
2. Click on CMD
open command prompt3. In command Prompt Copy following commands (Simply select the command and hold Ctrl+C and press Ctrl+V in command prompt)

 sfc /scannow 

sfc scannow
The system will take some time to check. Let it run for a while. If it finds any issues in “operating system” integrity it will automatically fix it.

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

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

In most cases Microsoft Windows update error 8000402 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: 26/01/2016
Solution ID: 967583

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  • April 13th, 2016

    Posted In: Microsoft Windows

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