Windows builds
From OpenZFS on OS X
Nightly builds
We do not have nightly builds. But occasional-builds.
Fully code-signed
https://www.lundman.net/OpenZFSOnWindows-debug-2.1.99-981-gba75bdc80-dirty.exe 2022/04/05 Add tunables https://www.lundman.net/OpenZFSOnWindows-debug-2.1.99-968-g32152cd8a-dirty.exe 2022/02/27 REPACK.PROPER https://www.lundman.net/OpenZFSOnWindows-debug-2.1.0-2041-gfbc23d71b-dirty.exe 2021/12/16 Win10 First fully signed installer
Partially code-signed
Use the Advanced Boot options and select to "disable driver signature enforcement"
https://www.lundman.net/OpenZFSOnWindows-debug-2.1.99-970-gc93310a05-dirty.exe 2022/03/14 add stack remaining kstats https://www.lundman.net/OpenZFSOnWindows-debug-2.1.99-969-gb919e8c14-dirty.exe 2022/03/11 Lots of pool-import work, REPACK
Not so relevant now
Or enable developer mode:
https://www.howtogeek.com/292914/what-is-developer-mode-in-windows-10/