Trojan.exe -

: Unlike a "virus" that spreads by itself, a Trojan must be manually downloaded or run by a user—often disguised as a helpful tool, game, or document.

: Your antivirus or firewall may be turned off without your permission. What Is a Trojan Horse? Trojan Virus and Malware Explained Trojan.exe

: High CPU or disk usage that makes your computer lag or crash. : Unlike a "virus" that spreads by itself,