intermediate
Boot loader to kernel handoff
The transition from firmware and boot manager into Windows kernel initialization.
Official Microsoft docs
Closest official references related to this topic on Microsoft Learn.
Why it matters
This handoff defines the earliest execution context for Windows and explains how boot-critical components get loaded.
Mental model
The loader stage prepares the runway so the kernel can land with enough context to continue safely.
How it works
- 1Boot configuration identifies which OS image and parameters should be used.
- 2Winload prepares kernel images, core drivers, and early memory structures.
- 3Control passes to the kernel once the boot environment is ready.
Key terms
- BCD
- Boot Configuration Data; the configuration store used during startup.
Multiple boot entries
Choosing between OS entries changes which images and parameters are prepared before the kernel starts.
Common misconception
Boot manager and OS loader are related but distinct stages with different responsibilities.
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