: Using keys from unofficial sources or unauthorized "key" lists often leads to blacklisted licenses or potential malware risks.

Then:

Some keys are region-locked. A key meant for a specific country (e.g., India or Brazil) may not work if your IP address is located in the US or Europe.

Visit a simulated phishing test site (e.g., from www.phishingbox.com test links). Kaspersky should block malicious URLs.