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Does a not-GUI connection work ... in a cmd box try
And check the lsnrctl status output for the http endpoint too.
$ sqlplus /nolog connect system ... password ... Connected.
Have you change your PC name since the install ?
if you have the change the lsnr file in network, XE folder.
Make sure that service Oracle MTS Recovery is not running.
can you connect to Db in cmd dos window sqlplus?
also check your hosts file in windows 127.0.0.1 might be resolved somewhere else.