| Error Message | Solution |
| :--- | :--- |
| "The program can't start because d3d12.dll is missing" | You are on Windows 7. D3D12 is Windows 10 only. Download D3D12On7 (Microsoft's official port). |
| "DXCpl.exe has stopped working" | You are missing the VC++ Redistributable 2015-2022. Install the x64 version. |
| "UI does not load - white window" | WPF issue. Install .NET Framework 4.8 and reboot. |
| "Access Denied when saving settings" | You must run DXCpl as Administrator (Right-click -> Run as admin). |
Do not download "DXCpl.exe" from sketchy EXE-sharing websites. They are riddled with malware. Here are the three proven methods that still work in 2021 for Windows 7 64-bit. download dxcplexe windows 7 64 bit work 2021
The DirectX Control Panel allows developers to enable debug output, check Direct3D version, and control DirectX runtime behavior. It is not included with standard Windows 7 — you must install it from the legacy DirectX SDK (June 2010). | Error Message | Solution | | :---
By 2021, many Windows 7 systems lacked up-to-date DirectX debug runtimes. To enable all features: Do not download "DXCpl