Hello 2G (04) Chun Anson Ho-Ching,
Based on what you described, it sounds like Windows' built-in lockout protection may still be active — after too many wrong attempts, it temporarily blocks all sign-ins for a period, even with the correct password.
A couple of things to try first:
- On the lock screen, tap Sign-in options and try switching to your PIN instead of password (or vice versa) — whichever your friends weren't using.
- If that's not available, try keeping the tablet powered on for up to 2 hours and the lockout should lift automatically. Don't restart or shut it down — that may reset the timer.
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