Windows Update Error 0x800f0845: Defined and Fixed

Even the most perfect operating system is not infallible, and security flaws, issues with compatibility, or outdated elements can often be found in its source code. Fortunately, Microsoft provides regular updates that not only introduce new functionality but also fix bugs and patch up any existing vulnerabilities present within the OS itself.

There are situations when you will face difficulties while updating your Windows system. Windows Update Error 0x800f0845 is one such typical error.

In this blog, we will cover the grounds for this error, what causes it, and how to fix it.

Causes of Windows Update Error 0x800f0845

Windows Update Error 0x800f0845 is an error code associated with Microsoft Windows operating systems. This error appears when users are attempting to update their system and typically occurs due to a few different causes.

Some of the common causes that can trigger Windows Update Error 0x800f0845 include:

  • Insufficient memory or hard drive space
  • Network problems such as slow internet connection, DNS issues, and proxy settings
  • Corrupted system files
  • Outdated components or drivers
  • The conflict between antivirus software and Windows update
  • Wrong or incomplete installation of Windows Update
  • Malware or virus infections

How to Fix Windows Update Error 0x800f0845?

The best way to fix Windows Update Error 0x800f0845 is to take the appropriate steps that correspond with the cause of your issue. Below are some of the solutions that can be used to fix this error:

Windows Update Error 0x800f0845

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FIX 1: Check the .NET Framework

The .NET Framework is a feature that helps your computer run certain applications. If the framework requirements for installation are not met, then you may experience error 0x800f0845. To resolve this situation, you can install the .NET framework manually.

Follow these steps to install it:

  1. In the Search Section of your Task Bar, search Windows features and select Turn Windows features on or off.Windows features
  2. Click on the check box related to .NET Framework, then click the OK button to save the change.Turn Windows features on or off
  3. A pop-up Window will appear. Click on Let Windows Update download the files for you option.Windows features let windows updates download
  4. This action will help you automatically download the required files and install the features.
  5. Reboot your computer and run the update again.

FIX 2: Temporarily Dropping the Firewall

A firewall is a security feature that prevents users from accessing certain websites or applications. It can also interfere with the Windows Update process, making it difficult to download the required files. To fix this, you can temporarily shut down the firewall on your computer.

Follow these steps to do so:

  1. In the Search Section of your Task Bar, search defender firewall and select Windows Defender Firewall.Search Defender Firewall
  2. Locate and click Turn Windows Defender Firewall on or off option on the left side.Turn defender firewall on or off
  3. Disable Windows Defender Firewall temporarily under private and public network headings and click the OK button.
    Turn off defender firewall settings
  4. Try to update again.

Note: Before beginning the installation process, take a moment to activate your firewall for maximum security. We don’t want you or your data vulnerable to any potential threats!

FIX 3: Create or Format Partition

Sometimes, the error can be caused by incomplete or corrupted partitions on your hard drive. To fix this issue, you can create a new partition or format the existing one in order to clear any corrupt files that may be affecting the update process.

Follow these steps to do it:

  1. In the Search Section of your Task Bar, search disk partitions and select Create and format hard disk partitions.disk partitions
  2. Ensure that your system has reserved at least 500 MB of space in the pop-up window before you.

FIX 4: Utilize System File Checker (SFC) to Diagnose Your Files

If you are receiving the 0x800f0845 error, it could be due to corrupted files. Fortunately, System File Checker (SFC) can help in diagnosing any damaged documents on your system and repair them with healthy versions if needed. Utilizing SFC is a great way to ensure that your data remains secure and free from potential threats or damage.

Follow these steps to do it:

  1. Search for the “Command Prompt” on the Windows search box, right-click on its icon, and select Run as administrator.
    run command prompt as administrator
  2. Type SFC /scannow in the command prompt window and press Enter to execute it.sfc scan started
  3. Wait for the scan to finish. It might take a few minutes.sfc scan completed
  4. Once the scan is completed, you should be able to install updates properly.

FIX 5: Utilize the DISM Command

The DISM (Deployment Image Servicing and Management) command can be used to diagnose and troubleshoot any issues that may be affecting your system. It is also a great tool for fixing any corrupt files or components that could be causing the 0x800f0845 error. You can use DISM instead of SFC if it is not able to effectively diagnose and repair your files.

Follow these steps to do it:

  1. Open the Command Prompt window with administrator privileges, as mentioned earlier.
  2. Type “DISM /Online /Cleanup-Image /RestoreHealth” and press Enter to execute the dism command
  3. Wait for the DISM command to finish running. This might take a few minutes.dism command executed
  4. After the command has been executed, try installing updates again and see if it works now.

FIX 6: Execute the Windows update troubleshooter

If you are still having issues with updating, you can also try running the Windows Update Troubleshooter. This is a built-in feature that can help you identify and fix any problems that may be preventing your system from updating.

Follow these steps to do it:

  1. Click on the Start button and choose Settings from the Start Menu.
  2. Select Update & Security under Windows update & security
  3. Switch to the Troubleshoot tab on the left pane and select Additional troubleshooters on the right.
  4. Look for the Windows Update troubleshooter and select windows update troubleshooter
  5. Click the Run the troubleshooter button.
  6. Windows will now look for the start detecting problem
  7. After the troubleshooting is completed, Windows will list the problems and possible solutions.problems detected by the troubleshooter


Windows Update Error 0x800f0845 can be a tricky issue to fix, but with the appropriate steps taken, it is possible to get your system back up and running. Be sure to check the .NET framework, temporarily disable your firewall settings, create a new partition or format an existing one, and utilize System File Checker (SFC) to diagnose any damaged files. Finally, run the Windows Update troubleshooter if all else fails. Following these steps should resolve your issue and get you back to using your computer in no time.

If you are still having difficulty with the updates, it is recommended that you contact a trained technician to discover if there may be an underlying problem.

What is the major cause of a Windows Update error?

Windows Update errors can have many causes, including problems with the .NET Framework, firewall settings, corrupt files or components, and incomplete or corrupted partitions. It is recommended that you try the solutions outlined in this article to resolve any issues. If all else fails, contact a trained technician for further assistance.

What should I do if the 0x800f0845 error persists?

If the 0x800f0845 error persists, it is recommended that you contact a trained technician to discover if there may be an underlying problem. He or she can provide further assistance in resolving this issue.

Is there any way to prevent Windows Update errors?

Unfortunately, no. However, you can take steps to ensure that your system is always up-to-date and secure by regularly checking for any available updates and installing them as soon as possible. Additionally, maintaining your firewall settings will help keep your data safe from potential threats or damage.

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