A "repair USB" (often called a bootable USB or recovery drive) is a portable version of Windows or a specialized diagnostic environment. It allows you to:

The system hangs, reboots in a loop, or shows black screens.

The USB drive will be formatted, erasing all existing data. Steps to Download and Create:

Save the file MediaCreationTool.exe to your desktop.

For advanced troubleshooting, especially for damaged hard drives or malware infections, professional tools offer more options.