>I added fbserver.exe to the exclusion list of NOD32 and it does not resolve
> the problem.

There are few such lists in NOD32.

> I can try deinstalling NOD32, but, as Gabor says, in the last message of the
> other post of this problem, it says that they have to reinstall the server
> because deinstalling NOD32 didn´t resolve the problem.
>
> Why do you say not to use SS. Do you mean CS does not have this problem?

Yes, CS have no such issue. Except of that NOD32 blocked child processes
of CS until you add fb_inet_server.exe into exclusion list of INET monitor.

> You also suggest not to use TCP/IP connections. How can I do that with
> superserver? Is there any configuration parameter anywhere?

Try connection string such as \\host\path instead of host:path.
It seems you need to read some basic documentation...

Regards,
Vlad