Wifi not working after updating kernels

Let’s hope it lives a long life.

That is typically what a cold boot infers; starting a computer from an off state; this is true no matter which OS is used.

Fast Startup is a hibernation variant, often enabled by default in Windows. If multibooting Linux and Windows, Fast Startup should be disabled in Windows. From an administrative command prompt use the command:

powercfg /h off

Otherwise, Windows will hibernate instead of shutting down; and frequently causes chaos with Linux boot functionality.

Fast Boot is something different entirely – a setting found in the BIOS which allows to skip many self-checks during pre-boot (before handoff to a boot loader).
It is generally recommended to disable Fast Boot when using Linux.

Just some clarification for anyone reading. Cheers.

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