Quick Summary
Error code 0x800f081f in Windows typically indicates a problem during the installation of a feature, update, or role. This usually means that the system is unable to locate the source files required to complete the installation process.
Common Causes
- Missing Source Files: The necessary source files for the feature, update, or role installation are missing or corrupted on the system. This can happen if the Windows installation media is damaged, the Windows Component Store is corrupted, or the specified source path is incorrect.
- Corrupted Component Store (CBS): The Component Based Servicing (CBS) manifest or the component store itself may be damaged. This prevents Windows from accessing or correctly processing the files needed for the installation.
- Incorrect Source Path: When manually specifying a source path for the installation via DISM or other tools, the path might be incorrect or inaccessible. This leads to the system being unable to locate the installation files.
- Network Connectivity Issues: If the installation relies on downloading files from a network location, connectivity problems can interrupt the process and cause the error. This is especially relevant when using Windows Update or specifying a UNC path as the source.
Step-by-Step Fixes
Method 1: Run System File Checker (SFC) Show Steps ↓
Step 1: Open Command Prompt as an administrator. You can do this by searching for 'cmd' in the Start Menu, right-clicking on 'Command Prompt', and selecting 'Run as administrator'.
Step 2: Type the following command and press Enter: sfc /scannow
Step 3: Wait for the scan to complete. This process may take some time. If SFC finds and repairs errors, restart your computer.
Method 2: Use DISM (Deployment Image Servicing and Management) tool Show Steps ↓
Step 1: Open Command Prompt as an administrator (as described in the previous method).
Step 2: Run the following command to check the health of the component store: DISM /Online /Cleanup-Image /CheckHealth
Step 3: If the component store is unhealthy, run the following command to scan for corruption: DISM /Online /Cleanup-Image /ScanHealth
Step 4: If corruption is found, run the following command to restore health: DISM /Online /Cleanup-Image /RestoreHealth. This step requires an internet connection, or you can specify a source path with the /Source: option if you have a Windows installation disc or ISO.
Step 5: Restart your computer after the DISM process completes.
Method 3: Specify Source Path for Feature Installation (DISM) Show Steps ↓
Step 1: Obtain a Windows installation ISO or disc that corresponds to the version of Windows you are running.
Step 2: Mount the ISO or insert the disc.
Step 3: Open Command Prompt as an administrator.
Step 4: Identify the drive letter assigned to the mounted ISO or disc.
Step 5: Run the following command, replacing X: with the correct drive letter and FeatureName with the name of the feature you are trying to install: DISM /Online /Enable-Feature /FeatureName:FeatureName /All /Source:X:\sources\sxs /LimitAccess. For example, to install .NET Framework 3.5 you'd replace FeatureName with NetFx3.
Method 4: Check for and fix Windows Update issues Show Steps ↓
Step 1: Run the built-in Windows Update troubleshooter. Search for 'Troubleshoot settings' in the start menu, and then select 'Windows Update' from the troubleshooter list and run the troubleshooter.
Step 2: If the troubleshooter identifies problems it can't fix, reset Windows Update components manually. To do this, open an administrator command prompt.
Step 3: Stop the Windows Update service by typing net stop wuauserv and pressing Enter.
Step 4: Stop the Background Intelligent Transfer Service by typing net stop bits and pressing Enter.
Step 5: Rename the SoftwareDistribution folder by typing ren C:\Windows\SoftwareDistribution SoftwareDistribution.old and pressing Enter.
Step 6: Restart the Windows Update service by typing net start wuauserv and pressing Enter.
Step 7: Restart the Background Intelligent Transfer Service by typing net start bits and pressing Enter.
Step 8: Try running Windows Update again.