See if Windows update installed 943899 on your system, if it did remove it.
See KB 943899 for the explanation.
> this just started. I have an acer laptop runing vista I also have norton
> running as my viruis protection. When I try to play a dvd I get the following
> message when I try to access the drive. "windows cannot access the specified
> devise, path or file. you may not have the appropriete permission to access
> them" also before this my dvd's would auto run a play with not problems. By
> the way I'm the administrator even though there are no other users for my