Since the Microsoft account works on other devices and the PC is online, the most likely causes are that Windows is still using a different sign-in method, the device has not synced the new password yet, or the Windows profile is damaged.
Try this in order:
- On the Windows sign-in screen, select Sign-in options and choose Password instead of PIN or Windows Hello.
- Safe Mode does not allow PIN or biometric sign-in, so password is the correct method to test.
- Confirm the PC is actually online from the lock screen.
- Select the Network icon on the lock screen.
- If Wi‑Fi is weak, use Ethernet if possible.
- If the PC cannot reach the internet, it may only accept the last cached password used on that device.
- Fully restart the PC.
- On the sign-in screen, select Power > Restart.
- If updates are pending, use Update and restart.
- If the password still fails, start in Safe Mode with Networking and try the account password there.
- On the sign-in screen, hold Shift and select Power > Restart.
- Go to Troubleshoot > Advanced options > Startup Settings > Restart.
- After restart, press 5 or F5 for Safe Mode with Networking.
- Then try signing in with the Microsoft account password, not the PIN.
- If Windows signs in with a temporary profile or shows “We can't sign in to your account”, treat it as a profile issue.
- First, restart in Safe Mode and then restart normally and try the original profile again.
- Warning: files created or changed while signed in to a temporary profile are lost when signing out unless saved elsewhere.
- If the account still is not accepted, use the Microsoft account recovery flow again and verify the exact account identity.
- Check the email domain carefully, such as .com vs .co.uk.
- If the primary alias is not recognized, try another alias or phone number on the same account.
- If the issue is now a lockout from too many attempts, stop retrying and use the Microsoft account sign-in helper to check the account state.
Important limits:
- Microsoft support cannot retrieve or bypass a lost or forgotten password.
- Support agents also cannot send password reset links or change account details.
- If Windows continues rejecting the password after Safe Mode with Networking and the account is confirmed correct, the remaining documented path is to use the sign-in helper or contact Microsoft Support through the public support flow.
References:
- User Account Access in Windows | Microsoft Support
- Troubleshoot Problems Signing In to Windows | Microsoft Support
- "We can't sign in to your account" error message | Microsoft Support
- My username and password have stopped working | Microsoft Support
- "You have tried too many times with an incorrect password" error when signing in to your Microsoft account | Microsoft Support
- Change or reset your Microsoft account password in Windows | Microsoft Support