i have windows xp in my pc. i have downloaded limewire basic 4.12.11 .for two weeks everything worked perfectly .however last thuesday after i started my computer a message appeared '' file is corrupt from transfer .setup expired '' and when i went to limewire all the files in my library mp3s mostly were transformed into executable archives . this happens every time i restart my computer or when i start it,until that moment all files work perfect. what can i do ? i have antivirus with the latest updates . how can iscan the archives before i download them?