Error 401 - Error Code 0x191 Fix & Repair

Error 401 - Error Code 0x191

How To Fix Error 401 - Error Code 0x191

Fix Error 401 - Error Code 0x191

1.Download Error 401 - Error Code 0x191 Fix

2.Download Windows Update



Click Here To Repair Error 401 - Error Code 0x191 Now

Error 401 - Error Code 0x191

Microsoft Windows Error Message 401:

'ERROR_THREAD_MODE_NOT_BACKGROUND' HTTP Error 401 - Unauthorized: Access is denied due to invalid credentials.

Error Description

The 401 error can happen in a number of situations. The first happens when using version 6.0 of the Internet Explorer program with either the Home or Professional Edition of the Windows XP Operating System. It happens when the Internet Explorer uses a proxy auto configuration file and accesses a website that requires a Kerberos authentication. The issue may happen because the website uses a CNAME resource record in the DNS (Domain Name System) to contact the server. This CNAME is not used by Internet Explorer to access the site it uses the host name. The error may also appear when connecting to a website using Integrated Windows authentication wherein its application pool recycles during the authentication. It often happens when the website is hosted on version 6 of the Microsoft Internet Information Services. The two-step process needed for the Integrated Windows authentication encounters problems when the applications recycle after each step.

Please note that permanent damage may occur to your PC if Error 401 - Error Code 0x191 is left alone and not repaired immediately.

Error 401 - Error Code 0x191 Solution

To repair this error, download and install each of the software tools listed below. These have been specifically designed to help repair this error;

  1. Download Windows Software Update - updates the drivers that control your computer.
  2. Download Error 401 - Error Code 0x191 Fix - helps fix Error 401 - Error Code 0x191 on your system.

Sometimes Error 401 - Error Code 0x191 can be caused by spyware or virus infections, so it's wise to run a removal program like the one below, to remove any spyware infections.

To begin the installation, once you've clicked on the a link above, a new window should appear with several options on it. Click Open or Run this program from its current location. Or to save the download to your computer for installation at a later time, click Save or Save this program to disk.

Once installed, run each program by pressing its scan/update button. Once the checks are done, you can let the tools fix the problem.

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Supported operating systems: Windows 7, Windows Vista, Windows XP, Windows Me, Windows 2000 & Windows 98.

This page shows you how to repair Error 401 - Error Code 0x191 and related errors.