Firmware, encryption, and filesystem traps that break dual boot.
I replaced Windows with Linux, and there's only one feature I miss ...
When extensive tweaking goes wrong, Timeshift can recover your Linux installation.
Windows install floppies and discs have gone the way of the dodo, but it still pays to keep a copy of the OS on a USB drive. Here's how to make your own.
This process is called a clean install, which is ironic as there's nothing particularly clean about it: Microsoft has enshittified Windows Setup.