This document explains how to fix Microsoft Windows error 80070BC9 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 updates were not installed. Failed: 94 updates
– Windows Update is set to automatically update and it constantly fails to update one important update – Update for Windows 7 for x64-based Systems (KB976098)

Error(s) found: Code 80070BC9 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 80070BC9 Windows Update Overview
Avg. Time to Resolve Issue   45 mins
Difficulty Critical
Log Name: MicrosofWindowsUpdateError4476.log
Source: Device-manager
Event ID: 9154
Operating System
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Level: Critical Error
User: User
  • Faulting Application Name: Window Update Manager , version: 1.5.8937.23028, time stamp: 0×37913797
  • Faulting module name: Windows  update.dll, version: 8.7.1351.57294
  • Exception code: 0xc07d004a
  • Fault offset: 0xb05f704a
  • Faulting process ID: 0×403
  • Faulting application start time: 0x800e4g92657758
  • Faulting application path: ~<userpath>
  • Faulting module path: ~C:\Windows\System32
  • Report ID: c3b74f76-6887-59a4-9912-1761baf7g748
Also Known as
  • WindowsUpdate_80070bc9
  • 80070BC9
  • WindowsUpdate_80070BC9e
  • 80070BC9e
  • 0x80070BC9
  • fehler code 80070BC9, foutcode 80070BC9, fejlkode 80070BC9, code d’erreur 80070BC9, codice di errore 80070BC9, feil kode 80070BC9, cod de eroare 80070BC9, código de error 80070BC9

Cause of 80070BC9 Windows Update Error Code

  • Application Conflict
  • Temp store location contains active threat

How to fix Windows Error Code 80070BC9

Step 1: Temporarily Disable Windows Firewall Setting

1. Hold Windows Key + R. Run Dialogue Box will open up.
2. Type Firewall.cpl and 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 for corrupt system files
1. Press Win Key + R. Run Dialogue Box will open up.
2. Type CMD and 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 “os” 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 80070BC9 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: 03/01/2016
Solution ID: 564834

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