Thanks for your kind reply,
just tried uninstall using avast clear and re-install avast Free,
but seems my Windows Defender Security Center still unable to provide avast status :
Avast Antivirus is installed as an antivirus provider.
Status unavailable, open Avast Antivirus for information.
Maybe someday I figure out myself whats wrong, for now, though Windows Defender Security Center can't provide avast status, it seems avast is running fine