vista recovery disc not booting..

error loading o/s is the error i recieve.. so i dloaded the recovery disc and there isn't a change in the start up... black screen with cursor.. i checked the disc on another computer and its fine.. i reordered the boot order and put the prog at top but no change.. f8 makes a beeping sound and has no e3ffect. windows vista is program.. Acer laptop.. can someone please help.. im computer illiterate
Press a key to continue booting when instructed or it well try to boot Windows on the hard drive.