Quick Summary
The error code 0x800f0950 typically indicates a failure during the installation of .NET Framework or other Windows features. This usually points to issues with accessing necessary installation files or conflicts with existing system configurations.
Common Causes
- Corrupted Windows Update Files: Damaged or incomplete Windows Update files can prevent the successful installation of new components like .NET Framework.
- Conflicting Software: Antivirus software or other system utilities might interfere with the installation process.
- Insufficient Permissions: The user account may lack the necessary administrative privileges to install the feature.
- Network Connectivity Issues: If the installation relies on downloading files from Microsoft servers, a disrupted network connection can cause the error.
- .NET Framework Corruption: Pre-existing corruption within the .NET Framework installation can lead to failures during upgrades or fresh installations.
- Component Store Corruption: The Windows component store (WinSxS folder) might be corrupted, preventing the system from enabling or installing new features.
Step-by-Step Fixes
Method 1: Run the Windows Update Troubleshooter
Step 1: Open the Settings app (Windows key + I).
Step 2: Go to Update & Security.
Step 3: Click on Troubleshoot.
Step 4: Select Windows Update and click Run the troubleshooter.
Step 5: Follow the on-screen instructions.
Step 6: Restart your computer after the troubleshooter completes.
Method 2: Use the DISM Tool to Repair the Component Store
Step 1: Open Command Prompt as administrator (search for 'cmd', right-click, and select 'Run as administrator').
Step 2: Type the following command and press Enter: DISM /Online /Cleanup-Image /RestoreHealth
Step 3: Wait for the process to complete. This may take some time.
Step 4: After DISM completes, run the System File Checker by typing: sfc /scannow and press Enter.
Step 5: Restart your computer after the scan completes.
Method 3: Temporarily Disable Antivirus Software
Step 1: Temporarily disable your antivirus software. Consult your antivirus software's documentation for specific instructions.
Step 2: Attempt to install the .NET Framework again.
Step 3: If the installation succeeds, re-enable your antivirus software.
Method 4: Install .NET Framework Manually
Step 1: Download the .NET Framework installer from the official Microsoft website.
Step 2: Right-click the installer and select Run as administrator.
Step 3: Follow the on-screen instructions to complete the installation.
Step 4: Restart your computer after the installation is finished.
Method 5: Check .NET Framework Versions and Repair
Step 1: Go to Control Panel -> Programs -> Programs and Features.
Step 2: Find the installed .NET Framework versions.
Step 3: Right-click on each .NET Framework version and select Uninstall/Change.
Step 4: If prompted, select the Repair option and follow the on-screen instructions for each version.
Step 5: Restart your computer after repairing the .NET Framework.