Newer ASUS laptops (ZenBook, ROG, VivoBook, TUF) often use UEFI firmware, which changes the timing of the F9 key. Here is the reliable method:
A: You have three options: 1) Contact ASUS support to order recovery media (costs ~$25–$50). 2) Download Windows from Microsoft and manually install drivers. 3) Use a Linux live USB to rescue any remaining data and then perform a clean install. asus f9 recovery