Laptop keyboard only writes numbers instead of letters?

I guess I must have pressed some combination, because now the laptop writes numbers at once, but I press on the letters.

Example:

U = 4

i = 5

O = 6

P = -

Etc…

Can someone help? Have Windows 10

Try to press fn + num then it should be normal again.

Perfect, everything back to the old!

No thing.

You had activated the integrated number block

So a kind of NumPad?