Introduction

In some cases, system environment variables may be accidentally modified, causing programs that depend on these variables to malfunction. This can lead to issues such as software failing to launch, crashes, functional abnormalities, or fonts not loading properly. Environment variables are information used by the operating system to define external environments, such as temporary file directories or system path information. By restoring these environment variables to their default settings, you can ensure that your system and software run normally.

Steps to Check and Restore Environment Variables

Open File Explorer, right-click on This PC, and select Properties.
In the new window, click on Advanced system settings on the left side.
In the "System Properties" dialog that appears, click on Environment Variables.
In the "Environment Variables" window, check if the TEMP and TMP user variables at the top have their default values (default is %USERPROFILE%\AppData\Local\Temp).
If you find that the values are not default, select the corresponding item and click Edit.
Change the variable value to %USERPROFILE%\AppData\Local\Temp (Note: %USERPROFILE% represents the current user's root directory).
For font activation issues, continue with the following steps.
In the system variables section below, find the PATH variable and ensure it includes the following paths:
- C:\Windows
- C:\Windows\System32
- C:\Windows\System32\WindowsPowerShell\v1.0\
If any are missing, add them manually.
After completing these steps, restart your device and try launching the relevant software again.

Key Notes

The default path for TEMP and TMP variables should be %USERPROFILE%\AppData\Local\Temp
Incorrect environment variables can cause various software issues including crashes and font problems
Always restart your device after modifying environment variables to ensure changes take effect
Be careful not to delete other important paths when editing the PATH variable

How to Check and Fix Abnormal TEMP/TMP Windows Environment Variables?