I'm a semi-literate newbie

I just recently switched over to Firefox after having problems with IE. Been busy exploring firefox and I installed ABP.
Everything was fine until a couple of days ago when I decided to add a filterlist. Please don't ask me which filterlist. I can't remember.
Now ABP basically blocks everything.
We share this pc at home and my kids are screaming at me!
My OS is Windows XP Professional Service Pack 2.
I've got free editions of Bit Defender, AVG Anti-Spyware 7.5 and Spyware Blaster.
My firewall is ZoneAlarm.
I tried uninstalling and then reinstalling but it didn't work.
Take care.
Bye