执行 gpedit.msc 时，If there is "Access denied。'Message，May be the MMC and start the associated program(Microsoft Management Console)Conductive 致 setting 跑掉，To fix this problem，You can simply reset the file association。
Open the "Tools" - "Folder Options."，Switch to the "File Types" tab，Locate the "msc"，And select it。
Click below the "change" button，In the "open file" window, select "Microsoft Management Console"。
If the list of no-show，Click below the "Browse"，Select "C:\WINDOWS\system32」底下的mmc.exe，Then open。
Press OK after selecting to。
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