Click and locate the downloaded .cab file.

Corrupt download or incorrect system edition (e.g., Single Language edition). Fix:

Restart your computer when prompted.

While Windows 8.1 is no longer officially supported by Microsoft, you can still download and install language packs if you have a valid license. You need an internet connection and administrative access to your PC.

If the "Download and install language pack" link in Method 1 is missing or returns an error: