key not working

I do not know if this makes a difference re configuration of keyboard/symbols  but computer ( Sony Vaio) purchased Russia . Anyway still same problem but if i press shift and alternative ' on  key next to Enter key, it gives me @ . Would prefer to try to sort it out back to it`s original if possible . Will attempt to get somebody to look into it here however if you can help then fantastic  .Await to hear from you in due course

[Moderator]

Does the same thing happen in safe mode?

Also, check the language settings in control panel.

Thanj you .