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.
Try to run the tool MVT (McAfee Virtua Technician) .
Link : mvt.mcafee.com
Check for third party antiovirus softwares installed in computer , If yes Unistall them.
Try to reinstall McAfee , Find the article on how to unistall and reinstall in the below article