Windows fast startup feature was introduced to speedup the booting process, but in case it is causing trouble, here's how you can turn it off.
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Published by Kunal Chowdhury
Windows Fast Startup feature was first introduced in Windows 8 to make your system boot up faster than the normal booting process by saving the current state of the kernel, a few other processes, and drivers into the disk. But that has some adverse issues when you really want to boot up in a clean environment.
If you are in a need to turn off the Fast Startup feature on Windows 8, Windows 8.1, Windows 10, or Windows 11, here is the step-by-step process to guide you.

Fast Startup is a Windows feature that was first introduced in Windows 8 operating system. When the feature is enabled, it retains the current state of the kernel and some critical drivers in the disk while shutting down the system. When you boot your system next time, it loads the same state of the kernel and the drivers from the disk to the memory, making it a quicker load.
As the kernel and the drivers need not load from scratch, it saves power and time while booting up.
Now, the next time when you shut down your system, it won't save the current state of the kernel and drivers into the disk. When you boot on your PC, it will boot from the scratch.
Solution Architect & Former Microsoft MVP
Kunal Chowdhury is an enterprise solution architect and former multi-year Microsoft MVP. He is the author of three technical books: Windows Presentation Foundation Development Cookbook, Mastering Visual Studio 2017, and the Mastering Visual Studio 2019.
He publishes technical articles on Kunal-Chowdhury.com.