Can't update Spybot 2

The program also froze my machine! It froze google's Chrome browser!

When I tried to update no luck despite a dozen attempts. Also; do I need to turn off my firewall (zonealarm) to make Spybot 2 work? Also turn off my anti-virus (avast 6)? This is a complicated program that refuses to update and affects many other parts of windows..couldn't open MS's Add/Remove programs even! Spybot 2 needs way more work, it will not update and seems to screw with the system.

What do I need to turn off to make Spybot 2 work? All my computer's protection? Who will do that for some spybot "anti-virus" which it says it has, but gives zero information on this very important point! Does it have a working firewall or not? No information about a possible firewall is given, it's a program with no information!