the problem is the firewall not tun itself on automatically. So I open McAfee LiveSafe and try to turn it on manually but when I click "turn on" button it change the status back to turn off immediately.
Then I try :
1. run McAfee Virtual Technician but nothing happen
2. Reinstall from Link on my email. the firewall can turn on until I shutdown and turn my laptop on next day the firewall can not turn on again.