Before doing anything else, you need to ensure that no malware was installed on your system during the activation process.

: This usually means the KMS server is unreachable. Check your internet connection or confirm the server address is still active. Product Key Issues : Ensure you are using a Volume License

slmgr /skms kms.digiboy.ir

: Reconfigures the Windows Software Licensing Management tool to ignore Microsoft's official infrastructure and route requests to the kms.digiboy.ir domain.