My keyboard havent numlck key ! what can i do? [Closed]

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Hello,

Hello,
Need a little bit of assistance with my Lenovo laptop! The number keys (and that whole row of keys) don't appear to be functioning properly. Instead of typing numbers, they either perform an action such as close the window I'm on, or will type random letters/numbers/symbols. eg the number key "6" types out "hy6j7n". All the keys in that row, uncluding the backspace key do not function properly.
The computer was previously persian (Windows 7's system language) but have changed everything to UK including adding the English language and changing region/keyboard/etc. This seems to be a software issue as far as I can see.
I can't figure this out and its driving me crazy!
Any help is greatly appreciated, thanks!