[Escribe SP1 1.5 fails to install]

There is no 3rd-party antimalware on this system. It's Windows 10, 17692. It's very possible that the OS has new antimalware capabilities in Windows Defender, but this is pretty much stock Windows 10, with that Insider build level. It's also possible this issue was brought up in earlier builds but I haven't touched escribe in a long time. 

https://blogs.windows.com/windowsexperience/2018/06/14/announcing-windows-10-insider-preview-build-17692/

[Escribe SP1 1.5 fails to install]

I am able to resolve this issue if I use 7-zip to manually unpack the installation file to a directory and run the app directly from there. So this appears to be the executable for the installer.

[Escribe SP1 1.5 fails to install]

 

This is occurring on Windows 10 Build 17692 (Insider Preview, Active/Slow ring. Previous version of escribe installed and ran fine. Same issue with the international version.