Troubleshooting Product Key Error 0x800F0805 in Windows 10

  • Error code 0x800f0805 during activation when upgrading Windows to a new version, such as Professional to Enterprise or Home to Professional, this article will help you.
  • We will tell you the best possible solution to fix the problem.
  • While the activation problem can be easily solved, the update error can be difficult to deal with.

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Hi there, I bought a Windows 10 Pro USB flash drive in 2017 and it worked fine. Discuss and support Windows 10 pro product key not working in Windows 10 Updates and Activation. In ‘Windows 10 Updates and Activation’, started by pcampos03, Dec 21, 2020, I had a problem with my laptop and had to replace the battery.

It depends on what you are doing when you encounter this error message. The following fixes will address either your activation or updating error message.

This article will help you if you receive the error code 0x800f0805 when activating Windows when upgrading from Professional to Enterprise or from Home to Professional. We will tell you the best way to fix the error. It can also occur when upgrading Windows.

The Windows Edition Was Not Detected

The Windows edition was not detected. Make sure the image you have selected is a valid copy of the Windows operating system.

0x800f0805 Windows 10

In this case, the upgrade will not be possible since the version has not been detected. This error can be caused by a bug in the delivery of the update to the machine. Even though your device works properly, you may be able to notice the issue if the server is experiencing any issues.

Here are some guidelines to follow if you receive error 0x800f0805. While activation problems are easy to resolve, update errors can be more complicated to resolve.

What causes the product key error 0x800F0805?

  • Damaged or missing system files: Improper installation of the operating system can cause this, which in turn leads to this error. System files are important to ensure that your device works properly. Sometimes system files get corrupted or deleted, which can cause Windows license/update installation to fail. Another reason may be corrupted areas of your hard drive that may be infected with viruses and malware.
  • Not enough disk space: If this error code is associated with a Windows update installation error, there is a possibility that the Windows drive (default C drive) does not have enough space to install Windows updates, which eventually leads to this error. Before looking for a solution, make sure you have at least 16 GB and 20 GB of free space on your C drive for 32- and 64-bit versions of Windows 10, respectively.
  • Poor Internet connection: Obviously, the Windows update/license installation process will display errors if you do not have an active Internet connection (good bandwidth). Limited Internet access despite having an Internet connection indicates that the problem is with your Internet connection and not with the Windows upgrade/installation key.
  • Update installation error: In rare cases, the Windows update installation error is due to errors in the updates supplied to your computer. This indicates that there is no problem with your system, but Microsoft’s servers are having problems due to errors.
  • Outdated drivers: Drivers are needed to run components not originally compatible with Windows 10, such as video cards, network cards, etc. If the driver has not been updated for some time, this may cause problems with Windows Update.
  • Major programs/processes: Some applications run automatically in the background, such as antivirus software and major system processes when you start your computer. These services can prevent you from updating Windows to the latest version or installing Windows updates, which ultimately causes errors.

How to resolve the product key error 0x800F0805?

Updated: February 2024

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Launch the Windows troubleshooter

  1. The settings of Windows 10 can be opened by pressing Windows + I.
  2. On the left side of the screen, click “Update and Security”.
  3. The Troubleshooting section will open on the right once you move to the left side and select it.
  4. Follow the instructions after clicking Windows Update.
  5. Check if the problem has been resolved by rebooting the system.

You should first consult the built-in troubleshooting tool if you encounter any problems with Windows Update. It can detect and fix a wide variety of problems.

Perform an SFC/DISM Scan

  1. By pressing Windows + R, you will open the Run dialog box.
  2. Using Ctrl + Shift + Enter, type “cmd” (without the quotes) in the search box.
  3. The program will ask if you want to grant administrator rights when it comes up. Click Yes when prompted.
  4. Enter the following command line at the extended command prompt.
    sfc /scannow
  5. Reboot the system after the process has completed.
  6. As described in steps 1 and 2, reopen the Administrator: Command Prompt window the next time you restart.
  7. Before you press Enter, type the following command line.
    You need to run DISM /Online /Cleanup-image /RestoreHealth to perform the procedure
  8. This process requires a stable network connection, as mentioned earlier.
  9. You can expect it to take between 15 and 30 minutes for the process to complete.
  10. If the problem persists, reboot your computer.

One of the useful features of Windows 10 is System File Checker (SFC), which checks for corrupted or missing files and replaces them with healthy copies. SFC restores new copies and replaces corrupted copies by using a local cache. A fresh copy of a corrupt or faulty system file is retrieved from an online server by DISM.

Manually download and install system updates

  1. The settings of Windows 10 can be opened by pressing Windows + I.
  2. The About option can be found after selecting the System tab.
  3. You can find your computer’s operating system type under Device Specifications.
  4. Choose Update and Security from the main settings window of Windows 10.
  5. If an update is pending, take note of the upgrade code, such as KB4078407 in this case.
  6. The Microsoft Update Catalog can be accessed by clicking this link.
  7. If you are looking for a specific update file, use the specified update code.
  8. Depending on your system version, download the update.
  9. .MSU files must be double-clicked to install.
  10. Once the update has been applied, restart your system.

0x800f0805 error fixes can be installed manually by downloading the latest system updates from Microsoft Update.

RECOMMENATION: Click here for help with Windows errors.

Frequently Asked Questions

  1. Examine the Windows update processes.
  2. Run DISM.
  3. Run SFC.
  4. Reset the Windows Update components.
  5. Reboot your computer.
  6. Force a new Windows Update download.
  7. Prevent websites, ISPs, and other parties from tracking you.
  8. Quick recovery of lost files.

Windows Update Error 0x800f0805 occurs when you update your version of Windows. Upgrading from Professional to Enterprise or from Home to Professional will cause this problem. Microsoft regularly releases updates and patches for the Windows operating system.

  1. Run the Windows Update troubleshooter.
  2. Use the DISM tool.
  3. Run an SFC scan.
  4. Reset the update components.
  5. Use the Windows Media Creation tool.
  6. Manually download and install updates.
  7. Reboot your computer.

The error occurs when you go to Settings > Update and Security > Activation. Try to activate Windows with a new key. Then run dism /online /get-targeteditions and you will get a list of Windows editions to upgrade from the current version.

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Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog,, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.