Understanding Error Code 0x800F086C

This article will guide you through understanding and resolving error code 0x800F086C. Encountering this error can be frustrating, but with the right knowledge, you can fix it efficiently.

What is Error Code 0x800F086C?

Error code 0x800F086C typically indicates a problem with Windows Update. When users attempt to install updates or check for new ones, they may encounter this error message: "Windows Update encountered an unknown error." This vague description can make troubleshooting challenging.

Causes of Error Code 0x800F086C

Several factors can contribute to the occurrence of error code 0x800F086C. Some common causes include:

  • Corrupted system files essential for Windows Update functionality.
  • Insufficient disk space preventing updates from downloading and installing correctly.
  • Incorrect date and time settings on your computer interfering with update communication.
  • Problems with your internet connection hindering the download process.

Affected Operating Systems

This error code has been reported across various versions of the Windows operating system, including:

  • Windows 10
  • Windows 8/8.1
  • Windows 7

It's important to note that while these are the most common affected systems, other versions might also experience this error.

Programs Often Associated with Error 0x800F086C

The error code primarily manifests itself within the Windows Update application. Users attempting updates through Windows Settings or the standalone update tool often encounter this issue.

How to Solve Error Code 0x800F086C

Trying a few different solutions can help pinpoint the cause of the error and resolve it effectively. Here are some steps you can take:

Run the Windows Update Troubleshooter

Windows includes a built-in troubleshooter specifically designed to address common update problems. To access it, follow these steps:

  1. Press Windows key + I to open Settings.
  2. Navigate to Update & Security.
  3. Select Troubleshoot from the left-hand menu.
  4. Click on Windows Update and then choose Run the troubleshooter.

Check for Disk Space Availability

Windows updates require a certain amount of free space on your hard drive for successful installation. Ensure you have at least 20GB of available space. You can check this by going to File Explorer, right-clicking on your system drive (usually C:), and selecting Properties.

Verify Date and Time Settings

Accurate date and time settings are crucial for proper communication with update servers.Verify that your computer's clock is set correctly:

  1. Open Settings by pressing Windows key + I.
  2. Go to Time & Language.
  3. Ensure the Set time automatically toggle is enabled.

Reset Windows Update Components

Resetting key Windows Update components can sometimes resolve stubborn errors. This involves stopping relevant services and renaming specific folders:

  1. Open Command Prompt as administrator (right-click on the Start button, select Command Prompt (Admin)).

  2. Execute the following commands one by one:

    • net stop wuauserv
    • net stop cryptSvc
    • net stop bits
    • net stop msiserver

  3. Rename the following folders in C:\Windows:

    • SoftwareDistribution
    • Catroot2 (rename them to SoftwareDistribution.old and Catroot2.old, respectively).

  4. Restart the services you stopped earlier:

    • net start wuauserv
    • net start cryptSvc
    • net start bits
    • net start msiserver

Run System File Checker (SFC) Scan

The SFC tool scans for and repairs corrupted system files that might be causing the error. To run an SFC scan, follow these steps:

  1. Open Command Prompt as administrator.
  2. Type sfc /scannow and press Enter.

Perform a Clean Boot

Performing a clean boot can help identify if a third-party program is interfering with Windows Update. To perform a clean boot:

  1. Press Windows key + R to open the Run dialog box.
  2. Type msconfig and press Enter.
  3. Go to the Services tab and check the box next to "Hide all Microsoft services."

  4. Click Disable All.

  5. Go to the Startup tab and click Open Task Manager.

  6. Disable all startup programs by right-clicking on them and selecting Disable.

  7. Close Task Manager and click OK in the System Configuration window.

  8. Restart your computer. If the error is resolved, it indicates a third-party program might be the cause. You can then try enabling services and startup programs one by one to isolate the problematic application.

Download and Install Updates Manually (from Microsoft)

If all else fails, you can attempt to download and install updates manually from Microsoft Update Catalog.

Remember that troubleshooting requires patience. By systematically trying these solutions, you'll increase your chances of resolving error code 0x800F086C and getting your Windows updates back on track.

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