If you get continual lockouts after changing your Active Directory password, there are several possible reasons. Two of the most common are using other devices to access your email and stored passwords in the credential manager of windows.
On some Windows 7 (SP1) computers, Windows Update becomes super slow even the computer is reasonably fast. There's one solution that seemed to have worked well for me (after trying a few other suggested solutions).
This Micro Tutorial will go in depth within Systems and Security in Windows 7 and will go into detail regarding Action Center, Windows Firewall, System, etc.
This will be demonstrated using Windows 7 operating system.