Win8 command prompt CMD command invalidation

Symptom: After entering the free windows xp computer system and xp system to download the base command prompt state, no matter what DOS command is executed, it prompts: "quote XX is not an internal or external command, nor is it ok Run the program or batch file ", as shown in the figure: Cause Analysis: This problem is caused by some software modifying the value of PATH. Solution: 1. Find the “Computer” icon on the desktop and click the right mouse button, and select “Attributes” in the pop-up menu. 2. Click on “Left System Settings” on the left side. In the system properties dialog box, click the “Environment Variables” button; www.dnzg.cn 4. Find the variable “Path” and click the “Edit” button. 5. Modify the variable value to “%SystemRoot%System32”. ;%SystemRoot%System32WindowsPowerShellv1.0”, finally click the "OK" button to end the setting; 6, restart the computer.