Do i need a firewall with a router

you should have only ONE malware/antivirus software running

for example run MSE but have the simple version of Malwarebytes install to run manually

what kind of firewall software are you thinking of installing?

also your router should have a firewall build in

My pick for the best firewall software is Outpost Firewall Pro. There are several reasons for this.Outpost blocks both inbound and outbound traffic.Outpost makes you invisible on the Internet by blocking hackers common scanning methods to find computers on the Internet.Web vulnerability scanning