To resolve the Windows ⁄8.1 optional features and update download error (often caused by corrupted cache files, outdated update agents, or network conflicts), you should reset the SoftwareDistribution folder, run the built-in Windows Update Troubleshooter, and manually update your Windows Update Agent.
The 5 most effective ways to fix this error are outlined below. 1. Reset the SoftwareDistribution Cache Folder
Corrupted temporary update data in your system cache commonly blocks new features from downloading. Clearing this cache forces Windows to recreate a clean download queue.
Open the Charms Bar (Windows Key + Q), type cmd, right-click Command Prompt, and select Run as Administrator.
Stop the update services by running:net stop wuauserv and then net stop bits.
Rename the cache folder using this command:ren %windir%\SoftwareDistribution SoftwareDistribution.old.
Restart the services by running:net start wuauserv and net start bits. 2. Run the Windows Update Troubleshooter
Windows 8 has an integrated automated repair tool capable of finding and fixing system license errors or missing update components automatically. Windows 8 update problems – Microsoft Q&A
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