Unable to connect to 11.2.0.1 Vista from another PC

Hello
I installed a database on Vista 32 Bit Version 11.2.0.1
When I connect locally through SQL * Plus, everything is ok. But when I try to connect fom another PC via sqlplus I get 12541 error no listener.
I think that there is a problem connecting via SQLNet. I get the same error using tnsping. But when I ping the pc target, I receive replies as well by using the name of the pc as address statistics.
I disabled the firewall and defender. Where is another part that is blocking the connection?

Please help me.
Kind regards
Siegwin

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = CIP)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost) (PORT = 1521))
)
)

-Stop the listener

-Replace localhost with the name of machine

-Start the receiver

-Wait up to a minute and post the output of "lsnrctl stat.

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