You might want to open two files in two separate windows to compare them. Also, if you want to edit two files simultaneously, you need to open them separately. That is why you can change Notepad ...
Not all third-party file managers have built-in settings to set them as the default file manager on Windows 11. You can make them your default file manager by running a reg file. You can also use ...
If a Windows upgrade has ever gone sideways on you, you know how vague and unhelpful the error messages can be. Here are my go-to troubleshooting tricks when that happens.