Has Neo4j Desktop ever worked or did it stop working for you?
What version of Neo4j Desktop?
Do you have any other processes on your system that are running neo4j?
Is Powershell in your system PATH?
Does a restart of your system clear up the problem?
If not, you might want to uninstall Neo4j Desktop and reinstall.
I recommend you install it as Admin allowing all users access, then use defaults for everything else.
Elaine