For all of ya who say that when they open command prompt and type:-
c:\> attrib -r -s -h autorun.inf
and it says 'c:\' is not recognized as an internal or external command, operable program or batch file.
Type this first:-
It will open a new line starting with C:\> and then type the commands that freddy has said in his post,
and when ya have typed the command of the C: drive, type F:, G: or whatever the names of other drives you have in ur pc and again type the same commands listed by freddy.
Ya problem is solved enjoy!!!