I had intended to use 'Online Armor Free Firewall', but recently learned it screws up VPNs, and precludes 'VirtualBox', so that is a no-go. Right now I'm considering 'Privatefirewall 7.0' (privacyware.com) & 'The Shield Firewall 5.0' (pcsecurityshield.com). Both got good reviews, but neither look to be 'standalone' firewalls, so I'm thinking they could conflict with my chosen antivirus, antispyware, antimalware, etc. If so, then my last choice would be 'Comodo Firewall Pro 3.0', which is also not a standalone, but that PCmag review says it can be made into one by disabling its 'Defense+'. Not sure what to do or which way to go, so I'm open to advice/recommendations. I need a standalone firewall that is easy for a beginner to deal with, guards both incoming & outgoing traffic, and will work with a NAT/SPI router.