Deleting that part of the entry got rid of the Powershell window on startup.
AutoRuns also showed the service that was trying to start:
I couldn't start because the path was already deleted. I still deleted the entry.
System seems back to normal now.
Have exactly the same issue on Windows 10 after installing something from an untrustworthy source.
"Bright VPN" and a "Web Indexing Service" suddently appeared in my task bar. A Powershell window pops up for a short amount of time at startup.
A folder at C:\Program Files (x86)\Bright VPN is...