Unable to get SQL Server 2016 CTP3 service to start on Windows 10
Interesting. Glad you got the SQL service to start. It should be okay to leave it as NT AUTHORITY\LOCALSERVICE for testing CTP3 on your workstation. In general for production servers on a domain it is best to provision and use domain service accounts for the SQL Server and Agent services - see https://www.simple-talk.com/sql/database-administration/provisioning-a-new-sql-server-instance-%E2%80%93-part-one/ .