I’m not sure where to report this apart from here.
The latest Windows Testing Build is not signed, and when trying to install it it fails an integrity check.
kicad-8.0-testing_8.0.0.111.gc59fac4089-x86_64-lite.exe
Sorry! Seems like the downloaded file was broken, even though chrome said it was downloaded…
This always happens to me when a Windows Testing download is incomplete.