Right-click "My Computer" -> "Properties" -> "Advanced" tab -> "Environment Variables" button -> Double-click the "TMP" environment variable and the environment variable will appear. An edit option box, delete the original value, because this value contains Chinese characters, you may not be able to see it directly, because sometimes it is replaced by "%USERPROFILE%". Use "C:/ Temp" value instead of the original value, and then install matlab7.0, there will be no problem.