I am using Windows 10 and United Kingdom Extended Layout. I installed this layout by following these passages:
- open the Windows 10 Control Panel
- click Options, that is to the right side of your installed language
- click on Add an input method
- now choose from the list not “United Kingdom”, but “United Kingdom Extended”. Sometimes I have seen that the input list is a little tricky: it could happen that you will not find the correct entry because the list is not in a correct alphabetical order: you could need to go down beyond the Z letter and see that the list continues after the Z letter, with some more entries, restarting from A.