This document explains how to fix Microsoft Windows error C1900101-4000D or 0xC1900101-4000D 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: 84 updates
– The installation failed in the SECOND_BOOT phase with an error in the MIGRATE_DATA operation
Error(s) found: Code C1900101-4000D 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 C1900101-4000D Windows Update Overview
Avg. Time to Resolve Issue   40 mins
Difficulty Critical
Log Name: MicrosofWindowsUpdateError9146.log
Source: Device
Event ID: 4063
Operating System
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Level: Warning
User: System
  • Faulting Application Name: Window Update Manager , version: 2.2.6038.62740, time stamp: 0×36344670
  • Faulting module name: Windows  update.dll, version: 8.7.4156.41838
  • Exception code: 0xc04a766d
  • Fault offset: 0xc07f803g
  • Faulting process ID: 0×286
  • Faulting application start time: 0x800g4f30511427
  • Faulting application path: ~<userpath>
  • Faulting module path: ~C:\Windows\System32
  • Report ID: e7g15e26-5672-41a6-6274-8362aec1d655
Also Known as
  • WindowsUpdate_c1900101-4000d
  • C1900101-4000D
  • WindowsUpdate_C1900101-4000De
  • C1900101-4000De
  • 0xC1900101-4000D
  • fehler code C1900101-4000D, foutcode C1900101-4000D, fejlkode C1900101-4000D, code d’erreur C1900101-4000D, codice di errore C1900101-4000D, feil kode C1900101-4000D, cod de eroare C1900101-4000D, código de error C1900101-4000D

Cause of C1900101-4000D Windows Update Error Code

  • Internet connectivity issue
  • Microsoft Windows internal Application Conflict

How to Resolve Windows Error Code C1900101-4000D

Step 1: Check Proxy Server Settings
1. Press Windows Key + R. Run Dialogue Box will open up.
2. Type CMD and Click OK.
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: 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 C1900101-4000D 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: 25/02/2016
Solution ID: 865935

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  • April 13th, 2016

    Posted In: Microsoft Windows

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