my character doesn't walk properly

When pressing the W the character starts to jerk, that is, he walks forward stopping constantly and repeatedly, this stops happening when, for example, I press the S, the D, or any key, but as you will understand it is annoying, it also happens to me same when walking backwards and sideways.
I have a computer with windows 10, I don't have any mod installed, I tried to change the keys with which I walk and the same thing keeps happening, I hope you can solve my problem, thank you very much.