Restart your PC and tap the BIOS key (usually ). Look for Boot Mode or UEFI/BIOS Mode .
Your BIOS settings for the SATA controller (AHCI vs. IDE) might be conflicting with the installer, or the drive is "locked" by a previous failed installation. 🚀 How to Fix It: Step-by-Step Method 1: The "Clean" Command (Easiest & Fastest)
From the Windows setup screen:
Type exit , close the window, and click on the installation screen. Method 2: Change BIOS/UEFI Settings
In Command Prompt ( Shift + F10 ):
Switch from (for GPT disks) or UEFI to Legacy/CSM (for MBR disks). Save and exit, then try the installation again. Method 3: Delete Existing Partitions