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SL_E_CHPA_INVALID_PRODUCT_KEY_FORMAT
SL_E_CHPA_INVALID_PRODUCT_KEY_FORMAT (0xc004c00f) is a Windows Software Licensing activation-service code. The key does not match the expected product-key format for the activation request. This is an input or key-type issue, not a network problem.
What to check
- Check for transcription errors and use the original key source.
- Confirm that the key belongs to the installed Windows edition and activation channel.
- Do not alter characters or rely on keys supplied by unofficial sites.
Microsoft: help with activation errors
Microsoft: Slmgr.vbs activation options
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