Try Kaspersky's free support tool: GetSystemInfo (GSI) diagnostic. Submit the report to Kaspersky’s forum – mention "Telegram blocked after license key activation." Disclaimer: This article is for educational purposes. Using cracked software is illegal and dangerous. Always obtain Kaspersky license keys from authorized resellers or the official Kaspersky website.
When you enter a new key, Kaspersky often resets certain heuristic analysis levels to "Maximum" or re-enables . Telegram uses custom encryption (MTProto 2.0) on top of TLS. To Kaspersky’s deep packet inspection (DPI), this looks like "unknown encrypted traffic" or even "potential proxy abuse." kaspersky internet security key telegram fix
Why does Telegram stop working right after I activate Kaspersky? And how do I solve it without deactivating my antivirus? kaspersky internet security key telegram fix