If your PC recognizes your phone while it is turned on, but loses connection in Fastboot mode, your driver is misconfigured.
Download the official from the Xiaomi website. Run the application on your computer. Click the Gear icon (Settings) in the top right corner. download miusbdriver.exe
The Google USB driver works with some Xiaomi devices but lacks fastboot support. Install it via Android Studio’s SDK Manager. If your PC recognizes your phone while it
Helps restore bricked or boot-looped devices by enabling low-level PC communication. Where to Download miusbdriver.exe Safely but loses connection in Fastboot mode
After downloading the ZIP file, extract it. Inside the extracted folder, you will find the file.
Look inside the extracted folder; you will find a subfolder named driver .
Open on your PC (Right-click Start > Device Manager).