You can create a partition either from within your current Windows session or during the installation process itself.

: Select Custom: Install Windows only (advanced) when prompted. Manage Partitions :

If you are installing alongside another OS, select the specific partition you created. You may need to click if it isn't recognized as NTFS.

: You'll see a list of partitions. Select the one you created for Windows and click "Next."

: Insert your Windows installation USB and boot from it.

This guide provides a general overview. Specific steps might vary depending on your computer's hardware and the version of Windows you're installing. Always refer to Microsoft's official documentation or your computer manufacturer's support resources for model-specific instructions.