The computer shows that the pin is not available. Solution:
1. First, press win+r to open the running window, enter services.msc and press Enter.
2. After calling out the service window, find the ipsec policy proxy service in the right window and double-click it to open it.
3. Finally, change the startup type of the service to automatic, and change the service status to running.
Conclusion: After the above steps, the problem that the pin code cannot be used can be solved. If you still find that the pin code doesn't work, restart the computer.
Personal identification number (English: personal identification number, abbreviated as PIN).
It is also translated into the user's personal identification number, usually called the PIN number. It is a password composed of a series of numbers, which is used to authenticate the identity of users and authorize them to enter the system. Usually used in ATM cards and credit card systems.