The is a dedicated, hidden slice of your storage drive designed as a "lifeboat" for your computer. It contains a lightweight version of your operating system—such as the Windows Recovery Environment (WinRE) or macOS Recovery —allowing you to troubleshoot, repair, or reinstall your OS without needing an external USB drive.
If your computer is running but you need to access advanced tools: Go to > System > Recovery . Locate Advanced startup and click Restart now . Your PC will reboot to the "Choose an option" blue screen. Method 2: From the Login Screen If you can’t log in: Hold the Shift key on your keyboard. how to boot from recovery partition