1. Windows 7 is not supported on Skylake.
This is because Intel removed the EHCI controller from the next-generation Skylake platform and changed it to the XHCI controller. The native Windows 7 system does not support the XHCI controller. Simply put, without EHCI, the USB interface cannot be identified when Windows 7 is installed on the Skylake platform. Then, you cannot use a USB flash drive, a mobile hard drive, or an external USB drive to install the Win7 system.
2. Xiaomi Air13 and Air13pro adopt the pcie nvme solid state protocol, which is not supported by Win7.
Currently, the native system only supports NVMe SSD in Win10. We recommend that you use Win10. Native Win7 does not support NVMe SSD.
3. Installation of the Win7 driver may fail.
Therefore, if you are using Air13 or Air13pro, we recommend that you use a pre-installed Win10 system. This gives you a better user experience.