Warning when installing nightly build

ParaView Support
1 
Windows protected your PC
Microsoft Defender SmartScreen prevented an unrecognized app from starting. Running this app might put your PC at risk.

App: 
ParaView-master-5.10.1-942-g83e8759cca-MPI-Windows-Python3.9-msvc2017-AMD64.exe 
Publisher:  
Unknown publisher

Is this normal? Installed from here:

https://www.paraview.org/download/

Kind regards

2

This is expected, nightlies are not signed.

3

Okay, thanks for clarification!