At the sign-in screen, click Accessibility in the lower-right corner and open On-Screen Keyboard. After signing in, open Notepad and try the physical keyboard there. No input, missed taps, and wrong characters point to different checks.
01If only one app ignores the keys
Section linkIf you can type in Notepad but not in another app, check whether that app has an active text field and reopen it after saving your work. If the physical keyboard fails in Notepad too but the On-Screen Keyboard works there, move on to the connection and keyboard settings.
02If a USB or wireless keyboard types nothing
Section linkPlug a wired keyboard or its USB receiver directly into a different port on the PC, without a hub. Check the batteries or charge a wireless keyboard. If possible, test the keyboard on another computer, or try a known working USB keyboard on yours. If the external keyboard works but the built-in laptop keyboard still fails, contact the laptop maker about that keyboard.
03If quick taps are ignored or characters are wrong
Section linkFor missed quick taps, open Settings > Accessibility > Keyboard. If Filter Keys is on and you don’t rely on it, turn it off briefly and retest. For wrong punctuation or letters, select the input language icon and check the keyboard layout against the physical keys. That icon is also available at sign-in when there is a choice of layouts.
04If you still need a way to type
Section linkAfter sign-in, Settings > Accessibility > Keyboard also lets you turn on On-Screen Keyboard with a mouse. Note which keys fail, whether a different keyboard works, and whether the failure starts before or after sign-in. Those details help support reproduce the problem.