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Violet ToolBox Does Not Open

Startup failures are commonly caused by a missing .NET 8 runtime or security software blocking the application.

Case 1: The .NET 8 runtime is missing​

Violet ToolBox checks its runtime at startup. If a runtime error dialog appears, use its download button, install the required runtime, and reopen the tool.

Missing runtime error dialogInterface after installing the runtime

Case 2: Security software blocked or quarantined the tool​

If Windows Security or another antivirus quarantined the program, verify the file source in protection history and download it again from the official website.

Windows Security protection settingsThird-party security software settings
Security advice

Do not leave system protection disabled. Only trust files downloaded from the official Violet ToolBox website and prefer an allow-list rule when necessary.