OK..按照下面步骤解决

To resolve this problem, follow these steps:

1. Click Start, right-click My Computer, and then click Properties.
2. Click the Advanced tab, and then click Environment Variables.
3. Click Path in the System variables list, and then click Edit.
4. Replace two of the paths in the Variable value box. To do this, follow these steps:
a.  Delete the following two paths in the Variable value box:

SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem
b.  Type the following text in the Variable value box to replace the paths that you removed in step 4a.

C:\Windows\System32;C:\Windows\system32\Wbem
Note C is the hard disk drive where Windows is installed, and Windows is the folder where Windows is installed.