If you have been using AutoIt for any length of time you will know that it is a great, and powerful scripting language. As with all powerful languages there comes a downside. Virus creation by those that are malicious. AutoIt has no virii installed on your system, and if a script you have created has been marked as a virus, (and you're not malicious) then this is a false positive. They found a set of instructions in an AutoIt EXE out there somewhere, took the general signature of the file, and