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FusionReactor Documentation

FusionReactor – wmic.exe cannot be found Error

FusionReactor – `wmic.exe cannot be found` Error

When installing FusionReactor on some Windows servers, you may encounter the error:

java.lang.IllegalStateException: wmic.exe cannot be found

This happens because wmic.exe is disabled or removed in newer Windows builds (Windows 10/11 and Server 2022+). FusionReactor relies on wmic.exe to query system information, so the absence of this utility prevents it from running correctly.

Resolution

1. Check if `wmic.exe` exists

Open Command Prompt.
Run:

where wmic

If no path is returned, wmic.exe is missing.

2. Enable `wmic.exe` via Optional Features

Open Windows Settings → Apps → Optional Features.
Click Add a feature.
Search for:
- RSAT: Windows Management Instrumentation (WMI) or
- WMIC (availability may differ by Windows build).
Install the feature.

3. Verify installation

Open Command Prompt again.
Run:

wmic cpu get caption

If a CPU description is returned, wmic.exe is working.

4. Restart FusionReactor

Restart the FusionReactor installer.
The installation should now complete without the wmic.exe error.