I cannot get X to run. When I type startx I see:

xauth: file /home/michael/.serverauth.16605 does not exist

(EE)
Fatal server error:
(EE) Server is already active for display 0
If this server is no longer running, remove /tmp/.X0-lock
and start again.
(EE)
(EE)
Please consult the CentOS support
at https://wiki.centos.org/Documentation
for help.
(EE)