原因是因为安装了KB2677070这个补丁,把它卸载了就可以了。
卸载步骤:
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Open Installed Updates by clicking the Start button
, clicking Control Panel, clicking Programs, and then, under Programs and Features, clicking View installed updates.
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Click the update that you want to remove, and then click Uninstall.
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.