This document explains how to fix Microsoft Windows error B56 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: 18 updates
Error(s) found: Code B56 Windows update encountered an unknown error.

This solutions applies for following version of Microsoft Windows:

  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Error B56 Windows Update Overview
Avg. Time to Resolve Issue   50 mins
Difficulty Critical
Log Name: MicrosofWindowsUpdateError3561.log
Source: Device
Event ID: 8622
Operating System
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Level: System Error
User: System
  • Faulting Application Name: Window Update Manager , version: 2.6.7930.85799, time stamp: 0×84741996
  • Faulting module name: Windows  error.dll, version: 5.5.3054.88668
  • Exception code: 0xc02b079a
  • Fault offset: 0xe03a335d
  • Faulting process ID: 0×467
  • Faulting application start time: 0x800c7g17344752
  • Faulting application path: ~<userpath>
  • Faulting module path: ~C:\Windows\System32
  • Report ID: g5a69e63-8387-22a7-5479-7227egg3b542
Also Known as
  • WindowsUpdate_b56
  • B56
  • WindowsUpdate_B56e
  • B56e
  • 0xB56
  • fehler code B56, foutcode B56, fejlkode B56, code d’erreur B56, codice di errore B56, feil kode B56, cod de eroare B56, código de error B56

Cause of B56 Windows Update Error Code

  • DNS Conflict
  • System Level Conflict

How to fix Windows Error Code B56

Step 1: Check System Integrity

1. In Start Searchbox type Cmd
2. Click on CMD
open command prompt3. In command Prompt Copy following commands (Simply select the command and press 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 “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. 

Step 2: Disable any installed Antivirus/Malware/Adware Program Temporarily

Some times Antivirus/Malware/Adware programs mark Microsoft Windows installer files as Spam and block it from installing. Please refer your vendors website for disabling it temporarily. Once installation is done you can activate it again.

In most cases Microsoft Windows update error code B56 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: 14/01/2016
Solution ID: 555055

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    April 13th, 2016

    Posted In: Microsoft Windows

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