I've created a sort of task sheduler with AutoIt which runs a program on a certain time.
The task shedular exe runs without any problem, but when it calls the backup utility, Avast gives the trojan horse alert (Win32.AutoIt Trojan Horse). Both programs are created with the same AutoIt version.
The filename is mentioned as backup.exe\[UPX] on the Avast alert message.
This shouldn't be an trojan...
[edit] The task shedular was already running some hours before avast updated his virus definitions this night.
It also won't run anymore now because avast denies the access