Hi there and welcome
To fix this,
Click the Start Start menu and select Settings.Select Time & language.Click Region & language in the left column.Select Add a language.Choose English (United Kingdom)and select United Kingdom for the language.
Set a default keyboard layout as UK
Click the Start Start menu and select Settings.Select Time & language.Click Region & language in the left column.Under Languages click the language you want as default and click Set as default.
This will force it to UK and correct the keyboard
I can also do these steps for you, and have made a request via Additional Services. This is optional, and if you choose to do this, I can, with your permission, remote into your computer while you watch and do all these steps (and deal with any problems that arise during them) for you. Or if you do not choose to take this service, we can continue here. This is no problem at all. Just let me know please.
Else let me know please how you go.