What to do if you modify the environment variable under Windows error

1. Right-click Property in My Computer icon to bring up the System Properties window
2. Find the advanced selection card in the System Properties window
3. In the Advanced tab, locate the Environment variable button and click Open
4. In the Popup environment variable window, in the box under System variable (S), locate and click Select Path variable name, then point edit (N) button
5. After selecting edit with variable named path, the edit window will pop up
6. Copy the value of the variable and modify it to:
    %systemroot%\system32;%systemroot%;%systemroot%\system32\wbem
    In the Paste Variable value text box

7. Click the OK button to close the Properties window

What to do if you modify the environment variable under Windows error