I was downloading with IDM, borwsing the web with FF3, working with Flash, opened an PDF at Library that I suddenly saw an .doc file with a strange filename like "24qwar3r13t5" on my desktop,so I opened and contained strange characters (like opening binary files with notepad). Is my computer hacked or something? I have ZoneAlarm and its updated 1 week ago but its not "genuine" as you know. any comments or site that I can check my PC? tnx.