1. Click Start, and then click Run.
  2. In the Open box, type regedit, and then click OK.

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  1. Locate and then click the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\KeyIso

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  1. In the right pane of the Registry Editor window, create a new subitem named ImagePath right click -à new -à Expandable string value

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5, type ImagePath in the edit box:

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6, double-click ImagePath Click to expand this image, In the Edit String dialog box that appears, input a correct path:

%SystemRoot%\system32\lsass.exe

and then click OK to close the Edit String dialog box.

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7, On the File menu, click Exit to quit Registry Editor.

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8,Shut down your computer, and then restart your computer normally.