Official message
Microsoft original
The activation server determined the specified product key is blocked.What this means
Microsoft has blocked the product key, so it cannot be used to activate. Keys like this usually come from an unofficial source, or they have been widely abused.
Common causes
- The product key did not come from a legitimate source.
- The product key was determined to be leaked or abused.
Do this first
Check whether the product key was bought through a legitimate channel.
What to do next
- 1Contact the seller of the product key, or Microsoft Support.
- 2If needed, obtain the license again through a legitimate channel.
Continue diagnosis from this code
Take what you know into the Windows activation diagnosis. It will ask a few more questions to narrow this down.
Sources
Related articles
About this data
The meaning and the original message come from the documents listed above. The same error code can have more than one cause. This site gives an order of checks. It does not decide your exact situation from the code alone.