I just installed the firewall, and restarted my computer. But when Vista (64 bit) was starting up again, it wouldn’t finish logging in. During the first 4-5 minutes of waiting the harddrive works a lot, then calms down, but nothing changes. It just keeps showing the loading screen.
My answer to the problem was to delete Comodo, but maybe there is something I can do to properly fix it?
Did you install the latest 3.22 version? Suggest you try it again; there have been some installer problems reported. And if you temporarily disable any other security programs through MS configuration that may help also. Usually indicates a conflict at load time, often can be worked around by manually changing the loader sequence.
Maybe it’s because I waited longer, or maybe because I deactivated th windows firewall. Either way, it worked this time, so thanks 
OK; we’ll mark this resolved then. PM a mod if the problem recurs; start a new thread if you discover other problems.