Quick Summary
The error code "0x80240020" in Windows Update typically indicates that an update download has completed, but there's a problem preventing the installation process from starting or completing successfully. This often signifies corrupted update files or a stalled update process, preventing Windows from finalizing the installation.
Common Causes
- Corrupted Update Files: The downloaded update files may be incomplete, damaged, or corrupted during the download process. This can happen due to network interruptions, disk errors, or other software interfering with the download.
- Insufficient Disk Space: The system may lack sufficient disk space on the system drive (usually C:) to extract and install the downloaded update files. Windows requires temporary space to unpack and apply updates.
- Conflicting Applications: Some third-party applications, especially antivirus software or system optimizers, might interfere with the update process. These programs may incorrectly identify update files as threats or prevent necessary system changes.
- Windows Update Service Issues: The Windows Update service or related components might be malfunctioning or stopped. This can prevent the system from properly detecting, downloading, and installing updates.
Step-by-Step Fixes
Method 1: Run the Windows Update Troubleshooter Show Steps ↓
Step 1: Open the Settings app (Windows key + I).
Step 2: Navigate to Update & Security > Troubleshoot.
Step 3: Click on Windows Update and then Run the troubleshooter. Follow the on-screen instructions.
Step 4: Restart your computer after the troubleshooter completes.
Method 2: Delete the Contents of the SoftwareDistribution Folder Show Steps ↓
Step 1: Stop the Windows Update service. Open Command Prompt as Administrator (search for "cmd", right-click, and select "Run as administrator").
Step 2: Type the following commands, pressing Enter after each one:
net stop wuauserv
net stop cryptsvc
net stop bits
net stop msiserver
Step 3: Open File Explorer and navigate to C:\Windows\SoftwareDistribution.
Step 4: Delete all the files and folders within the SoftwareDistribution folder.
Step 5: Restart the Windows Update and related services by running the following commands in the Command Prompt (as Administrator), pressing Enter after each one:
net start wuauserv
net start cryptsvc
net start bits
net start msiserver
Step 6: Restart your computer and try running Windows Update again.
Method 3: Free Up Disk Space Show Steps ↓
Step 1: Open File Explorer.
Step 2: Right-click on your C: drive and select Properties.
Step 3: Click on Disk Cleanup.
Step 4: Check the boxes for the types of files you want to delete (e.g., Temporary files, Recycle Bin). You can also click on Clean up system files.
Step 5: Click OK and confirm the deletion. Ensure you have at least 20 GB of free space.
Step 6: Empty your Recycle Bin.
Method 4: Disable Antivirus Software Temporarily Show Steps ↓
Step 1: Temporarily disable your antivirus software.
Step 2: Attempt the Windows Update again.
Step 3: After the update completes (successfully or unsuccessfully), re-enable your antivirus software.
Note: Be extremely cautious when disabling your antivirus software, as it leaves your system vulnerable. Only disable it temporarily for the update process.
Method 5: Use the Media Creation Tool for an In-Place Upgrade Show Steps ↓
Step 1: Download the Media Creation Tool from the official Microsoft website.
Step 2: Run the Media Creation Tool and select Upgrade this PC now.
Step 3: Follow the on-screen instructions. It will download the latest version of Windows and reinstall it, keeping your files and applications.
Step 4: Ensure to choose the option to keep your personal files and apps during the upgrade process. This is the key to doing an "in-place upgrade" rather than a clean install.