What is the first thing that kernel does when winload turns over the startup process to it?

When Winload hands over the startup process to the Windows kernel, the first thing the kernel does is initialize the system's hardware abstraction layer (HAL) and set up the necessary data structures for the operating system. It then configures system memory, loads device drivers, and initializes critical kernel components. Following these preparations, the kernel starts the process of launching system services and user sessions, ultimately leading to the display of the Windows login screen.