Resolving Error 0x800f0831: Installation Issues with .NET Framework 3.5 on Windows Server 2016

To address error code 0x800f0831 while installing .NET Framework 3.5 on Windows Server 2016, follow these strategic steps:

1. Verify existing installation of .NET Framework 3.5: Navigate to the Control Panel, access Programs and Features, and check for Microsoft .NET Framework 3.5. If already installed, no further action is necessary.
2. Employ the DISM command: Launch Command Prompt as an administrator and input: DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs. Ensure to adjust 'D:' to the drive letter corresponding to your Windows Server 2016 installer.
3. Utilize Windows Server 2016 installer media: Insert your Windows Server 2016 installer media, and in File Explorer, proceed to the Sources directory to locate the 'sxs' folder. Copy this to a preferred location on your server. Then, in Command Prompt as an administrator, execute: Dism /online /enable-feature /featurename:NetFx3 /All /LimitAccess /Source:C:\sxs, replacing 'C:' with the drive where you have moved the 'sxs' folder.
4. Conduct Windows updates: Confirm your Windows Server 2016 is fully updated. Navigate to Settings > Update & Security > Windows Update and apply any pending updates before attempting to install .NET Framework 3.5 once more.
5. Temporarily disable antivirus software: Antivirus programs can occasionally disrupt the installation of .NET Framework 3.5. Consider deactivating your antivirus temporarily to facilitate the installation process.