This document explains how to fix Microsoft Windows error 0XC1900101-0X20017 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: 77 updates
Error(s) found: Code 0XC1900101-0X20017 Windows update encountered an unknown error.
– 0xC1900101 – 0x20017 The installation failed in the SAFE_OS phase with an error during BOOT operation

This solutions applies for following version of Microsoft Windows:

  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Error 0XC1900101-0X20017 Windows Update Overview
Avg. Time to Resolve Issue   45 mins
Difficulty Hard
Log Name: MicrosofWindowsUpdateError8566.log
Source: Device
Event ID: 6092
Operating System
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Level: Warning
User: System
  • Faulting Application Name: Window Update Manager , version: 2.1.6827.53560, time stamp: 0×24776061
  • Faulting module name: Windows  error.dll, version: 8.3.0616.45413
  • Exception code: 0xc01c570c
  • Fault offset: 0xc04g463e
  • Faulting process ID: 0×716
  • Faulting application start time: 0x800e0g68729950
  • Faulting application path: ~<userpath>
  • Faulting module path: ~C:\Windows\System32
  • Report ID: e5b44g72-8615-21a3-2517-2648eaa2e321
Also Known as
  • WindowsUpdate_0xc1900101-0x20017
  • 0XC1900101-0X20017
  • WindowsUpdate_0XC1900101-0X20017e
  • 0XC1900101-0X20017e
  • 0x0XC1900101-0X20017
  • fehler code 0XC1900101-0X20017, foutcode 0XC1900101-0X20017, fejlkode 0XC1900101-0X20017, code d’erreur 0XC1900101-0X20017, codice di errore 0XC1900101-0X20017, feil kode 0XC1900101-0X20017, cod de eroare 0XC1900101-0X20017, código de error 0XC1900101-0X20017

Cause of 0XC1900101-0X20017 Windows Update Error Code

  • Windows Firewall blocking the installation
  • Temp store location is infected with active threat

How to fix Windows Error 0XC1900101-0X20017

Step 1: Temporarily Disable any installed 3rd Party Antivirus

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.

Step 2: Disable Proxy:
1. Press Windows Key + R. Run Dialogue Box will open up.
2. Enter CMD and Press 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. 

In most cases Microsoft Windows update error 0XC1900101-0X20017 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: 829591

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