Cannot open drives in xp

hello,
i m using windows xp black.when i try to double click on any of the three drives,it shows error "c:\resycled\boot.com is not a valid win32 application." my antivirus also detects virus in "c:boot.com" but cannot repair it. i tried deleting the autorun.inf file from cmd as you said but it dosn't works- it gives message file not found..please help