Locked keyboard on Acer laptop V3 571

Hello,

I probably made a mistake by typing too quickly on my Acer V3 571, and the keyboard seems to be locked, making it impossible to type.

I'm currently on my husband's desktop PC.

Is there a shortcut or command to unlock it and reactivate the keyboard, please? I'm a bit desperate! If I turn it off and on again, I'm afraid it might be worse and I won’t even be able to type the password if it remembers the command...

I tried fn+F6 but it doesn't change anything (I found it on the internet); it only turns the screen off and on.

Thank you for your help