This document explains how to fix Microsoft Windows error code C1900101-30018 or 0xC1900101-30018 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: 86 updates
– Installation status: Failed
Error(s) found: Code C1900101-30018 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 C1900101-30018 Windows Update Overview
Avg. Time to Resolve Issue   40 mins
Difficulty Hard
Log Name: MicrosofWindowsUpdateError6868.log
Source: Device
Event ID: 4771
Operating System
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows 10
Level: Warning
User: System
  • Faulting Application Name: Window Update Manager , version: 7.9.1680.87920, time stamp: 0×22066527
  • Faulting module name: Windows  event.dll, version: 1.4.7908.51615
  • Exception code: 0xd08e024a
  • Fault offset: 0xd02e721e
  • Faulting process ID: 0×800
  • Faulting application start time: 0x800a8d96766671
  • Faulting application path: ~<userpath>
  • Faulting module path: ~C:\Windows\System32
  • Report ID: a2d49b88-5275-55d6-9582-2356ece6e388
Also Known as
  • WindowsUpdate_c1900101-30018
  • C1900101-30018
  • WindowsUpdate_C1900101-30018e
  • C1900101-30018e
  • 0xC1900101-30018
  • fehler code C1900101-30018, foutcode C1900101-30018, fejlkode C1900101-30018, code d’erreur C1900101-30018, codice di errore C1900101-30018, feil kode C1900101-30018, cod de eroare C1900101-30018, código de error C1900101-30018

Cause of C1900101-30018 Windows Update Error Code

  • Windows Firewall blocking the installation
  • Temp files location contains active malware

How to fix Windows Error C1900101-30018

Step 1: Check for corrupt system files

1. In Start Searchbox type “CMD” (without quotes)
2. Click on CMD
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 “operating system” 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. 

Step 2: 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.

In most cases Microsoft Windows update error code C1900101-30018 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: 16/02/2016
Solution ID: 328213

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  • April 13th, 2016

    Posted In: Microsoft Windows

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