Sometimes, the error is literal. Your license may have genuinely expired, or if you purchased a key from an unauthorized reseller, ESET may have revoked it, flagging it in the KB 2885 documentation.
Ensuring the is set to start automatically in Windows Services. [1, 3] eset kb 2885
: Always create a new folder specifically for the installation package and move the downloaded .exe there before running it. Run the Installer : Sometimes, the error is literal