This document explains how to fix Microsoft Windows error code 8007643 or 0x8007643  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: 25 updates KB976982, KB2952664,
Error(s) found: Code 8007643 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 8007643 Windows Update Overview
Avg. Time to Resolve Issue   30 mins
Difficulty Very Hard
Log Name: MicrosofWindowsUpdateError9958.log
Source: Service Control manager
Event ID: 8506
Operating System
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Level: Warning
User: User
  • Faulting Application Name: Window Update Manager , version: 3.4.5306.35263, time stamp: 0×19649725
  • Faulting module name: Windows  log.dll, version: 6.4.4636.61469
  • Exception code: 0xe09a497b
  • Fault offset: 0xe01b180b
  • Faulting process ID: 0×882
  • Faulting application start time: 0x800c0g62393059
  • Faulting application path: ~<userpath>
  • Faulting module path: ~C:\Windows\System32
  • Report ID: c2g38e74-5259-19a7-9153-1373ebf7g151
Also Known as
  • WindowsUpdate_8007643
  • 8007643
  • WindowsUpdate_8007643e
  • 8007643e
  • 0x8007643
  • fehler code 8007643, foutcode 8007643, fejlkode 8007643, code d’erreur 8007643, codice di errore 8007643, feil kode 8007643, cod de eroare 8007643, código de error 8007643

Cause of 8007643 Windows Update Error Code

  • Internet connectivity issue
  • System DLL files conflict

Steps to resolve Windows Error 8007643

Step 1: Disable Windows Firewall Temporarily :
1. Hold Windows Key + R and Type “Firewall.cpl” (without quotes)
2. Click 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 System Integrity:

1. Press Windows Key + R and Type cmd
2. Press OK.
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 “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 code 8007643 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: 16/01/2016
Solution ID: 575755

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  • April 13th, 2016

    Posted In: Microsoft Windows

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