This made it spread much faster than any other previous email worm. The worm inflicts damage on the local machine, overwriting random types of files (including Office files, image files, and audio files however after overwriting MP3 files the virus hides the file), and sends a copy of itself to all addresses in the Windows Address Book used by Microsoft Outlook. Opening the attachment activates the Visual Basic script. The latter file extension (' vbs', a type of interpreted file), was most often hidden by default on Windows computers of the time (as it is an extension for a file type that is known by Windows), leading unwitting users to think it was a normal text file. ILOVEYOU, sometimes referred to as Love Bug or Love Letter for you, is a computer worm that infected over ten million Windows personal computers on and after when it started spreading as an email message with the subject line 'ILOVEYOU' and the attachment ''.
