Please Help me. I can’t access any file on my computer. The other night I installed the latest Comodo Firewall, that I downloaded from the Comodo site. I don’t know what rule I set. I am using Blackbox4Windows (A Shell replacer). Today I did a restart of the computer and when windows begins I couldn’t access any file on my computer, even if I use run. How can I revert all to the defaults. Without enter in to normal windows, I am a little noob in this. I was trying do a restoration of the system, but don’t know how to do this. Maybe everything that is skinned by BB4Win is been not allowed. ??? 
Could be some virus? And this have nothing related to Comodo? BB4Win loads and then everything is blocked. Since then I’ve benn using Comodo 2. Yesterday when I installed everthing was working fine.
Ok. (L) I solved, I just quit the shell, then I can open explorer, open Comodo, etc…
Another question is: How I sent back comodo to his defaults settings? I mean: to when it was when I installed it? Maybe I need to read the manual. Thanks for Comodo, great firewall. I was not testing with this. :-[
Go to Defense+ → Advanced → Computer security policy → see if you have anything put to be blocked. Try unblocking Windows related items.