: Unofficial "portable" versions may not receive critical security patches, leaving you vulnerable to known exploits.

: This is a reputable third-party provider that offers Telegram Desktop Portable in their own verified format, which is open-source and regularly updated.

: Modified clients can intercept your traffic or access your contact lists without your knowledge. Security Best Practices for Telegram Desktop

Instead, you should use the official Telegram Desktop Portable version, which is distributed as a secure, standalone executable directly by the developers. Official & Safe Download Options