Windows 10 password entered incorrectly but correctly?

I started my laptop and entered my password correctly, but then I got the message that it was wrong. Could it be a virus?

Wrong conclusion: you entered the wrong password. Your pc is not lying to you about this.

A virus is less likely - if not excluded.
Nevertheless: Viruses want to remain undetected - changing the password would be counterproductive. In addition, you should have noticed if you had not just deactivated the user account control.