Is autorun.inf a virus?

my AVG scanner recently detected an autorun.inf file to my laptop. AVG detects autron.inf as a virus, in particular, a worm. i know that autorun.inf is a read only file which enables ur pc to automatically run selected devices such as cd or a usb drive. However, whenever my AVG conducts a virus scan it keeps on detecting autorun.inf as a virus. after detecting, AVG states that it is a threat. However, everytime AVG scans my laptop the same process and detection occurs. Is autorun.inf really a virus or a threat to my laptop? what shall i do with it? i found autorun.inf at my drive c C:\autorun.inf