Type select disk X (Replace X with the number of your intended drive, usually Disk 0).
Type list disk to see all connected storage.
You don't need to boot into Windows to use Diskpart. You can trigger it directly from the installation media. Boot your PC using a Windows 10 USB or DVD. diskpart windows 10 install
If you see an error saying the disk is of the GPT partition style but your BIOS is set to Legacy (or vice versa), Diskpart is the only way to fix it without third-party software. Use the convert gpt or convert mbr commands after the clean step to match your BIOS settings.
If clean fails, try typing attributes disk clear readonly while the disk is selected. This removes software-level locks preventing the installation. Best Practices for a Clean Install Type select disk X (Replace X with the
Type clean .⚠️ Warning: This deletes every file and partition on the selected disk.
To avoid accidentally wiping the wrong disk, keep only your primary SSD/HDD plugged in during this process. You can trigger it directly from the installation media
If your drive has old partitions or the wrong file system, follow these steps to reset it completely.
Return to the installation window, click "Refresh," and select the newly cleaned space to continue. Troubleshooting Common Errors
Always use list disk twice to ensure you have selected the correct "Disk X" before running the clean command.
