Pin Number

1. Use your Microsoft account password: If you have set up your Acer device with a Microsoft account, you can try using your Microsoft account password to log in.
2. Use a different sign-in option: You can try using a different sign-in option such as a fingerprint scanner or a password.
3. Use the Password Reset option: You can reset your PIN by using the Password Reset option on the sign-in screen. To do this, click on "I forgot my PIN" and follow the prompts to reset your PIN.
4. Use a recovery key: If you set up a recovery key when you first created your PIN, you can use it to reset your PIN. To do this, click on "I forgot my PIN" and select "Use a recovery key" and follow the prompts.

If none of these options work, you may need to reset your device to factory settings, which will erase all of your data. It's important to note that resetting your device to factory settings should only be done as a last resort.