Hi,
Welcome to Microsoft community forums. Sorry, to know that you are facing this issue on the new computer.
- Did you delete the old PIN before you tried creating a new one?
- Did you follow all the troubleshooting steps suggested in this thread?
- Did you connect your computer to Domain network?
Windows 8 has a feature where you can use a 4 digit PIN to sign-in to your Windows account. If you are a domain user, this feature is disabled by default.
Try these steps to remove your old PIN:
a) Press "Windows Logo"+ "C" keys on the keyboard to display the charms bar.
b) Click on "Settings" and then click on "Change PC settings" at the bottom
c) Select "Users" on the left panel of "PC Settings"
d) Click "Remove PIN" under "Sign in options"
e) Once the old PIN is removed, try creating the new PIN and check if that resolves the issue.
Please follow all the troubleshooting steps from this thread. If the issue remains unresolved, please get back to us and we would be happy to help you.