How to Fix Microsoft Visual C++ Runtime / Debug Assertion Failed Error When Opening QRD Firmware Tool
If you see a Microsoft Visual C++ Runtime Library or Debug Assertion Failed error when opening a QRD firmware update tool, the firmware program may not have extracted its required files correctly.
This guide explains how to manually extract the firmware package and run the update tool correctly.
1、Problem

Error example:
- Microsoft Visual C++ Runtime Library
- Debug Assertion Failed
- filecore.cpp Line 320
2、Cause
This issue is caused by the firmware EXE being a self-extracting package.
When opened directly:
- Files are extracted to a temporary system folder
- Some files may not load correctly
- The update tool cannot read required files → triggers C++ error
3、Solution
Step 1 – Do NOT open the EXE directly
Do not double-click the firmware EXE file.
Step 2 – Extract the EXE manually

- Right-click the EXE file
- Open with WinRAR or 7-Zip
- Extract all files to a folder
Example folder:
Desktop / FerroxM5_Update
Step 3 – Keep all files in the same folder

Make sure:
- All files stay together
- Do NOT move or delete any files
Step 4 – Run as Administrator

- Right-click the update tool
- Click Run as administrator
4、If Issue Still Exists
Try the following:
- Re-download the firmware file
- Disable antivirus temporarily
- Use another USB port
- Restart your PC and try again