Error: WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION - The results of download and installation could not be read from the registry due to an unrecognized data format version.

How to fix the Windows Update Error WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION 0x80243001

This article discusses Error WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION, also known as 0x80243001 and it means The results of download and installation could not be read from the registry due to an unrecognized data format version.

About Windows Update Error

There are numerous potential errors that a user may encounter when downloading and installing Windows updates.

When these kinds of errors occur, you may experience a number of things that can help you what steps you need to perform in order to resolve the problem. Here are symptoms, causes and probable resolutions to the problem.

Definitions (Beta)

Here we list some definitions for the words contained in your error, in an attempt to help you understand your problem. This is a work in progress, so sometimes we might define the word incorrectly, so feel free to skip this section!

  • Download - Receiving data to a local system from a remote system, or to initiate such a data transfer.
  • Format - It may refer to text formatting, content format, file format, document file format, etc.
  • Installation - The process of installation is the deployment of an application onto a device for future execution and use.
  • Registry - The Windows Registry is a database where configuration settings for hardware, software and the Windows operating system itself are saved.
  • Version - Version defines an unique state of a computer software or a file.


While updating computer, user might suddenly experience a sudden slow processing or a download which fails to complete. The failing computer might also go into a sudden reboot, either a single instance of the computer shutting down or a continuous loop which prevents user to log into the computer. Error messages might also come up the screen.

(For illustrative purposes only)


What could have happened? Windows Updates are downloaded from Microsoft. File corruption may happen at any time when updates are downloaded due to different reasons. It may be because the previous update did not install properly. It can also be because there was a problem receiving the file, which may be due to problems with system files. Whatever the case may be, users can correct the problem by following these repair methods.

Repair Methods

If a repair method works for you, please click the upvote button to the left of the answer, this will let other users know which repair method is currently working the best.

Please note: Neither nor it's writers claim responsibility for the results of the actions taken from employing any of the repair methods listed on this page - you complete these steps at your own risk.

For Windows 7
  • Right click the Network icon on the system tray, located on the right bottom part of the desktop.
  • Click Troubleshoot problem. It will launch a wizard which will diagnose the problem.
  • Run the wizard and let it finish.
  • Run Windows Update after running the troubleshooter to check if the problem is fixed.
For Windows 8
  • Press the Window key on your keyboard. This is the key with the Windows logo just beside the Ctrl key.
  • On the appearing search box, type Network problems, it will come up with several search results, choose Identify and repair network problems.
  • Run the Wizard that will come up and let it finish diagnosing and applying correction to the problem.
  • Run Windows update once again.
For Windows 10
  • Click the Start button, then click the Settings button to open settings.
  • On Windows Settings, click Update & Security.
  • On the left side, click Troubleshoot, then click Windows Update on the tab that will appear on the right side.
  • This will run the troubleshooter and apply fix to the problem.
  • After this is done, run Windows Update again to see if the problem was fixed.
You might have downloaded the update several times and it's still doing the same thing. You can then try clearing the Updates folder by doing the following:
  • Click Windows key on your keyboard together with the letter R to open the Run window.
  • On this window, type c:\Windows\SoftwareDistribution\Download, then click OK.
  • This will launch the folder where the downloaded Windows updates are.
  • Highlight everything by clicking Ctrl+A on the keyboard, then Delete everything in the folder.
  • Sometimes some of the files will be difficult to erase. Just try deletion over again until nothing is left in the folder.
  • Run Windows update again to check.
Your security center might be preventing the files from getting downloaded. If tha is the case, then just open your antivirus program by right clicking on it on your system tray, then disable it from there. Then run the updater again after this action. Just remember to turn it on again after downloading and installing the Windows updates so that your computer will be protected again.
Your computer might be using an external device like an external drive or an external DVD or SD card reader. These devices might also cause your computer to act in an abnormal manner. In that case, disconnect the device by unplugging device or by going to the Device Manager and by disabling them from there.
When all else fails, you can use the Installation disk or download a copy of the Media Creation Tool to install updates from the disk.
Windows 7
Installing updates from the Windows 7 DVD is done pretty much the same way as clean install except for a few differences:
  • Instead of booting from the DVD, you can run the installer inside windows.
  • Make sure you are logged in an administrator account.
  • Ensure that you have added the installer in your Security Center exclusion or you may disable your firewall and antivirus to ensure that will not be a problem.
  • Place your installer disk into your DVD drive and run autoplay. If it did not automatically run, you may right click the DVD drive and click run autoplay.
  • You will see the AutoPlay window, just click Run Setup.
  • Once the installer is up, click Install Now button.
  • The next screen should give you the option to Go online to get the latest updates for installation. Before clicking that, make sure that the radio button at the bottom of that window is not ticked.
  • This will run the search and install utility, wait for it to finish.
  • Next screen will show you license terms, click the radio button to accept, then click next.
  • Then you will see two options, to do a Custom Install or an Upgrade.
  • Click the Upgrade button and let the computer install the upgrade.
  • Just let the process finish, supply any information that may be asked of you.
Windows 10
Windows 10 users have rarely experienced problem downloading updates using normal procedure but in case you are one of the rare cases when this occur, you may download the Media Creation Tool from Microsoft.
  • Make sure you have a blank flash drive where you will install your windows 10 media creation tool.
  • Download the installation file from It will guide you through the process.
  • Once done, open Windows Explorer and click the flash drive on the list of drives.
  • Double click the Setup.exe file to launch installation file.
  • Select language, time and currency format and input method, then click next.
  • Click Install Now button. This will lead to the next window which will allow Upgrade or Custom installation.
  • Click Upgrade to install upgrades.
  • Follow the prompts and let installation finish.
Other languages:

Wie beheben WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION (0x80243001) - Die Ergebnisse des Downloads und der Installation konnten aufgrund einer unbekannten Version des Datenformats nicht aus der Registrierung gelesen werden.
Come fissare WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION (0x80243001) - I risultati del download e dell'installazione non possono essere letti dal registro a causa di una versione del formato dati non riconosciuta.
Hoe maak je WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION (0x80243001) - De resultaten van het downloaden en installeren konden niet uit het register worden gelezen vanwege een niet-herkende versie van het gegevensformaat.
Comment réparer WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION (0x80243001) - Les résultats du téléchargement et de l'installation n'ont pas pu être lus à partir du registre en raison d'une version de format de données non reconnue.
어떻게 고치는 지 WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION (0x80243001) - 인식할 수 없는 데이터 형식 버전으로 인해 레지스트리에서 다운로드 및 설치 결과를 읽을 수 없습니다.
Como corrigir o WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION (0x80243001) - Os resultados do download e da instalação não puderam ser lidos no registro devido a uma versão do formato de dados não reconhecida.
Hur man åtgärdar WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION (0x80243001) - Resultaten av nedladdning och installation kunde inte läsas från registret på grund av en okänd version av dataformat.
Как исправить WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION (0x80243001) - Не удалось прочитать результаты загрузки и установки из реестра из-за нераспознанной версии формата данных.
Jak naprawić WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION (0x80243001) - Nie można odczytać wyników pobierania i instalacji z rejestru z powodu nierozpoznanej wersji formatu danych.
Cómo arreglar WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION (0x80243001) - Los resultados de la descarga y la instalación no se pudieron leer desde el registro debido a una versión de formato de datos no reconocida.

The Author About The Author: Phil Hart has been a Microsoft Community Contributor since 2010. With a current point score over 100,000, they've contributed more than 3000 answers in the Microsoft Support forums and have created almost 200 new help articles in the Technet Wiki.

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Article ID: ACX013988EN

Applies To: Windows 10, Windows 8.1, Windows 7, Windows Vista, Windows XP, Windows 2000

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