When you select Security Center in Control Panel on Windows XP, you receive an error similar to:
The security center is currently unavailable because the security center service has not started or was stopped. Please close this window and restart the computer (or start the security center service) and then open the security center again.
This behavior will occur if the Security Center service is disabled.
To resolve this problem:
1. Open a CMD.EXE window.
2. Type the following command and press Enter:
REG ADD HKLM\SYSTEM\CurrentControlSet\Services\wscsvc /V Start /T REG_DWORD /F /D 2
3. Shutdown and restart Windows XP.