In order to be a trustworthy software distributor with signed drivers and software, we need to follow Adafruit  instructions to sign windows drivers and executables.
Step 1). Install Windows SDK.
Select all features (about 3 GB). You can now find signtools.exe and certmgr.exe in
C:\Program Files (x86)\Windows Kits\10\bin\10.0.16299.0\x64 (or a newer version, if one has been released).
Step 2). Download Windows WDK (Windows Driver Kit)
Step 3). Buy & Download Code Signing Certificate
User Name: PAR221676_lotussys
Step 4). Install Certificate
After installation Certificate, it is easy to check it out in Cert Manager. Visit C:\Program Files (x86)\Windows Kits\10\bin\10.0.18362.0\x86 and run certmgr.exe. In Personal Tab, you will be able to see your signing certificate!
References:. Adafruit, "How to Sign Windows Drivers & Executables",