This document explains how to fix 0xc000012f Microsoft Windows error code  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: 95 updates
Error(s) found: Code 0xc000012f 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 0xc000012f Windows Update Overview
Avg. Time to Resolve Issue   50 mins
Difficulty Critical
Log Name: MicrosofWindowsUpdateError1499.log
Source: Device-manager
Event ID: 1470
Operating System
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Level: Warning
User: User
  • Faulting Application Name: Window Update Manager , version: 6.9.3368.78035, time stamp: 0×10838765
  • Faulting module name: Windows  log.dll, version: 6.5.7186.29646
  • Exception code: 0xe09a803a
  • Fault offset: 0xe01c310a
  • Faulting process ID: 0×223
  • Faulting application start time: 0x800e0f25419212
  • Faulting application path: ~<userpath>
  • Faulting module path: ~C:\Windows\System32
  • Report ID: e6c51c74-7747-23e6-7729-2656cef1e646
Also Known as
  • WindowsUpdate_word experienced an error trying to open the file 2013
  • 0xc000012f
  • WindowsUpdate_0xc000012fe
  • 0xc000012fe
  • 0x0xc000012f
  • fehler code `, foutcode 0xc000012f, fejlkode 0xc000012f, code d’erreur 0xc000012f, codice di errore 0xc000012f, feil kode 0xc000012f, cod de eroare 0xc000012f, código de error 0xc000012f

Cause of 0xc000012f Windows Update Error Code

  • Slow Internet Connection
  • Temp files location contains active threat

Steps to resolve Windows Error Code 0xc000012f

Step 1: Disable Proxy:

1. In Start Searchbox type CMD
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. 

Step 2: Check Windows Firewall :
1. Hold Windows Key + R and Enter Firewall.cpl
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.

In most cases Microsoft Windows update error code 0xc000012f 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: 07/02/2016
Solution ID: 648040

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