How to Fix 0x800F081F (Windows Features (DISM))
Quick Answer: Error 0x800F081F indicates that Windows cannot find the necessary source files to install or enable a feature, often related to .NET Framework 3.5. The fastest fix typically involves specifying an alternative source path for the installation files.
What Causes This Error
- Required source files for the feature are missing or corrupted.
- Windows Update components are corrupted or misconfigured.
- Group Policy settings are preventing access to Windows Update or alternative source paths.
- Antivirus software or firewall is blocking access to necessary files or servers.
- Incorrect or outdated system image (WIM) file is being used as a source.
- Network connectivity issues preventing access to online sources.
Step-by-Step Fixes
Fix 1: Specify an Alternative Source Path for 0x800F081F
Insert the Windows installation media (DVD or USB drive) into your computer.,Open Command Prompt as an administrator.,Type the following command, replacing 'D:\sources\sxs' with the actual path to the 'sxs' folder on your installation media (e.g., 'E:\sources\sxs' if E: is your DVD drive): 'Dism /online /enable-feature /featurename:NetFx3 /All /LimitAccess /Source:D:\sources\sxs',Press Enter to execute the command.,Restart your computer after the process completes.
Fix 2: Use Group Policy Editor to Specify Source for Optional Component Installation
Press Windows Key + R, type 'gpedit.msc', and press Enter to open the Local Group Policy Editor.,Navigate to 'Computer Configuration' > 'Administrative Templates' > 'System'.,Locate and double-click 'Specify settings for optional component installation and component repair'.,Select 'Enabled'.,Check the box for 'Contact Windows Update directly to download repair content instead of Windows Server Update Services (WSUS)'.,Click 'Apply' and then 'OK'.,Close the Group Policy Editor and restart your computer.
Fix 3: Run System File Checker (SFC) and DISM Restore Health
Open Command Prompt as an administrator.,Type 'sfc /scannow' and press Enter. Allow the scan to complete.,After SFC completes, type 'Dism /Online /Cleanup-Image /RestoreHealth' and press Enter. Allow this process to complete.,Restart your computer and attempt to install the feature again.
Fix 4: Temporarily Disable Antivirus/Firewall
Access your antivirus software settings and temporarily disable its real-time protection.,Access your Windows Firewall settings and temporarily disable it.,Attempt to install the Windows feature.,Re-enable your antivirus software and firewall immediately after testing.
FAQs
Q: What does error 0x800F081F mean?
A: Error 0x800F081F indicates that the Deployment Image Servicing and Management (DISM) tool or Windows Features cannot locate the necessary source files to install or enable a specific Windows feature, most commonly .NET Framework 3.5.
Q: Why does this error often appear when installing .NET Framework 3.5?
A: Windows 8 and later versions do not include .NET Framework 3.5 (which includes .NET 2.0 and 3.0) as an enabled feature by default. When an application requires it, Windows attempts to download it from Windows Update or use local installation media. If these sources are inaccessible or corrupted, the 0x800F081F error occurs.
Q: Can I use an ISO file as a source for DISM?
A: Yes, you can mount a Windows ISO file as a virtual drive and then use the path to its 'sources\sxs' folder as the source for the DISM command, similar to using physical installation media.