I would say Comodo Firewall but it isnt there yet for me. I am very happy that its good enough for me now so that I am able to use the program, and it is very powerful in Proactive with auto-sandoboxing enabled for unrecognized. Disappearing settings doesn't seem to be an issue so far, but I have a backup of settings anyway just in case. Not installing much on this PC or it could be an issue having to constantly update the settings backup.
I voted 360 TS for its specific system protections (on 3 computers) and because it works well with Comodo, which is the best free firewall. I use Avast on two computers though, and it is also very effective.
Standard user account
UAC (Always notify)
Avast/360 TS (BD and Avira defs enabled)
Comodo FW (A/S set On for unrecognized/Proactive)
NVT ERP
CheckMAL AppCheck Antimalware
EMET 5.5 (custom settings)
Zemana Anti-malware (opinion scanner)
NVT ERP and below use almost no resources, which makes them excellent for any configuration of security products.