Solr service will not start
Solr uses a socket that is set to 8983 by default.
Solr will not start if some other process is using that socket. There is another socket used when Solr is started as a service, and that socket is called STOP.PORT, which is 8985 by default. These two Solr ports must be different or the Solr service will not start. If you need to change the default Solr port because some other process is using it, refer to your Solr documentation.
Do not change the Solr port to be the same as the STOP.PORT socket. The STOP.PORT socket is used to communicate to Solr to stop running when you click Stop in the XyEnterprise Solr Server Properties panel. You can change the STOP.PORT socket by running the services manager from your system tray (located at the right of the task bar). If you hover your cursor over the icon in the tray, a pop-up shows "XyEnterprise Solr Service." Double-click that icon to see a panel that lets you to edit the STOP.PORT socket (see Starting and Stopping Search Services).