Error Database · Windows

0xC004F050

Quick overview: 0xC004F050

The key belongs to a volume licensing program (MAK or KMS) and is not valid for individual retail activation. Volume keys are issued to organizations for deploying Windows across many machines — they should never be sold to consumers.

This page documents Invalid Product Key — Volume License Misuse on Windows. Activation codes are licensing checkpoints—they rarely indicate hardware failure. Use the steps below before assuming your product key is permanently invalid.

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Invalid Product Key — Volume License Misuse

Error code: 0xC004F050 Platform: Windows Updated: 2026-07-17

What This Error Means

The key belongs to a volume licensing program (MAK or KMS) and is not valid for individual retail activation. Volume keys are issued to organizations for deploying Windows across many machines — they should never be sold to consumers.

If you purchased this key from a marketplace, it was likely resold against Microsoft's licensing terms. Activation may work temporarily but can be revoked without notice.

How to Fix It

  1. Run slmgr /dlv to check the license channel — look for 'VOLUME' or 'KMS'.
  2. Volume keys cannot be legally transferred to personal PCs for permanent use.
  3. Request a refund from the seller citing invalid license type.
  4. Purchase a retail or OEM key appropriate for single-PC use.
  5. Avoid extremely low-priced Pro keys — they are often volume or OEM keys resold improperly.