If you have just purchased a Kaspersky antivirus product, you likely received a 20-digit alphanumeric activation code (format: XXXXX-XXXXX-XXXXX-XXXXX). While this code is the standard method to activate your software, many advanced users and IT administrators prefer using a license key file (.key extension).
Method 1: Using Kaspersky's built-in tool (recommended) convert kaspersky activation code to key file hot
Here is a step-by-step guide using Method 1: The Ultimate Guide: How to Convert a Kaspersky
.key file attached.