If I reboot my computer my Mcafee firewall will stay on for about 30 min and then shut itself off for no reason. If I try to turn it back on it will immediately shut off again. I have only had Mcafee installed on this computer and it has been working fine since I bought it last year until the last few weeks. As far as I know it does not have any viruses (ran a scan on it today and came back with nothing) and as far as I know all of the updates are up to date. Please help thanks.