An email from Kaspersky or an authorized retailer will contain the code.
Q: Is Kaspersky 21.3.10 compatible with my device? A: Check the system requirements for Kaspersky 21.3.10 to ensure it's compatible with your device. kaspersky 21.3.10 activation code
A valid activation code for Kaspersky 21.3.10 is a paid product key obtained through official channels. There are no legitimate “free codes.” For safe and reliable protection, either use Kaspersky Free or purchase a license. Attempting to use cracked codes puts your security and data at risk. An email from Kaspersky or an authorized retailer