Hmm, u really don't need so many programs.
ad-aware: detecs adbots etc that other ones don't
spybot: make sure to install the tea-timer, it makes sure that programs don't add themselves in the startup withour ur permission
spywareblaster:Really usefull, kind of like the immunisize with spybot, but much better in my opinion, so stops spyware before it gets to ur pc
I also used to have microsoft anti-spyware, but with these programs I don't have any problems with spyware/adware so I didn't feel I needed any more programs so I didn't install it after reformatting my pc.
And for anti-virus I use AntiVir personal edition, very good. And it's free.
For firewall I use my routers one, no need for a software firewall and the router ones are the best ones. I could like marry my router firewall
, not a single problem after I got it.