How to Fix Error 0x8007007B (Volume License KMS Activation Error)

Error message: "Error code 0x8007007B. The file name, directory name, or volume label syntax is incorrect."

This error occurs when Windows tries to reach a Key Management Service (KMS) server that no longer exists—frequently seen on second-hand PCs or laptops previously used in a school or corporate setting.

How to Fix 0x8007007B Permanently

1. Open Command Prompt as Administrator (Win + X, select Terminal / Command Prompt (Admin)).
2. Clear any old KMS host connection by running:

   slmgr.vbs /ckms

3. Install your new retail key purchased from WindowsKey:

   slmgr.vbs /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

4. Connect your PC to the internet and execute:

   slmgr.vbs /ato

A confirmation window will appear stating "Product activated successfully."