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Activation via a key file is only suitable for applications downloaded directly from Doctor Web's site (this method is not suitable for applications installed from the Play Market!).
Copy the key file to any folder in the device's memory or to its memory card.
You can extract the archive's contents and copy only the file with the *.key extension, or transfer the whole ZIP archive to your device;
The key file will be installed in the system and a message notifying you about this will appear on the screen.
If any error messages appear, try to activate your license using a different network connection.
If you continue to encounter problems, detailed diagnostics are required. Send a written request to our technical support service. Please attach the error screenshot to your request, and enter your serial number.
Doctor Web is the Russian developer of Dr.Web anti-virus software. Dr.Web anti-virus software has been developed since 1992.
2-12А, 3rd street Yamskogo polya, Moscow, Russia, 125040