WINDOWS "secondary option" can not be saved

Users questions: I do not have accessibility options, and later copied in other people's computers access.cpl to the system32 directory, and fill in the corresponding registry value, the result set the End Point Application - OK, then open or what are not set, restart after Save or not, one of my friends are So, are there any solutions?
Experts answer: System file is missing, you can repair the Start menu click Run enter CMD Enter enter the command SFC * SCANNOWSFC and * insert a space between the optical disk system, the system automatically drives the system files in the system tray text Compare and repair parts
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