What should I do if the cmd prompt in win10 system is not an internal or external command?

The solution is as follows:

1. Right-click the computer and select [Properties];

2. Click Advanced System Settings;

3. Switch to the [Advanced] column and click [Environment Variables];

4. Find "windir" in the system variables (if not, create a new variable with the same name), and edit its variable value as "%SystemRoot%", click OK.

Recommended tutorial:windows tutorial

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