I have a new MacBook 10.4.6 with intell

I quit LW and restarted. The screens I had before in Search and Library were were gone. The number, bottom left of screen reads 44 files I'm sharing. Is this my original screen. If so, how do I view it?

Also my firewall icon next to the #44 has the wall blocking the globe which, if I read the info correctly, a firewall is up and blocking. Is this good or bad? If bad, how do I fix it?