A key file is a specific file type (typically with a .key extension) used to activate Kaspersky business solutions without needing a direct internet connection to the activation servers.
However, I can provide a general review of (legitimate version) to help you evaluate the software itself: kaspersky endpoint security 10 key file 627
Kaspersky will send a .zip archive to your email. This archive contains your official .key file and a compatibility text document explaining which solutions the key applies to. A key file is a specific file type (typically with a