The default Sitecore container configuration uses specific ports. To avoid any conflicts, ensure that the following ports are not being used by another process: 443, 8079, 8081, 8984, and 14330.
In your case, it seems SOLR is already running, check http://localhost:8984/solr/#/. If it is then either you can skip the installation of SOLR or stop the service to install a new one.
Check if you have Apache Solr or any other service running on port 8984:
Get-Process -Id (Get-NetTCPConnection -LocalPort 8984).OwningProcess
If you do, you must stop it:
Stop-Service -Name "<the name of your service>"
