After the update installs, you can restart Windows to exit Safe Mode. Accessible from the Startup Settings menu, this mode disables everything but the absolute essentials Windows needs to run, ensuring that any software conflicts that could be interfering with the update are removed. Utilise your computer’s physical power or reset button, and bear in mind you might have to hold it down for a few seconds. Resetting your PC during installation is considered to be a cardinal sin and explicitly warned against by manufacturers, but if your update is definitely stuck then you don’t have a lot of options.
