What if Windows 7 cannot change the domain user password?

Q: There is a Windows 7 client that cannot change the password of the domain user. The system prompts as follows: Windows security : “unable to update the password, tha value provided for the new password contains values ​​that are not allowed in password”
After checking, the password is indeed in compliance with the complexity requirements, and the same password can be changed under the XP system. There are several Win 7 computers in the LAN. This can be modified in OWA, but it can't be modified by Alt+ Ctrl+ Del. Solve!
A: According to your description, it should be because of the client. The password policy is not synchronized with the DC (domain controller). Execute the following command on the machine in question to force the group policy: gpupdate /force
and then restart the computer. Synchronize the group policy to modify the password of the domain user.