Certification Authorities for ClickOnce deployment

Robert Barnes 71 Reputation points
2022-04-05T13:01:21.19+00:00

I have been distributing my software using ClickOnce, signed with a test certificate. When Windows 10 users click the download the dialog pauses on a a screen
Windows protected your PC
Microsoft Defender Smartscreen prevented an unrecognized app from starting ....
More Info
and a button [Don't Run]

By clicking More Info another button [Run Anyway] appears, you can click that, and the ClickOnce continues.

Windows 11 users don't get the [Run Anyway] button, so it is not possible for them to install and run my software. Presumably this is a deliberate change to improve security.

Please confirm that I need to solve this problem by purchasing a trusted certificate from a Certification Authority. Do I need a particular type of certificate, or doesn't it matter? A quick search found several authorities, with prices ranging from $69/yr to $374.67/yr. Is there any reason to choose a more expensive option?

In case it's relevant: -
MANASYS Jazz (www.jazzsoftware.co.nz) is written mostly in VB.NET with Visual Studio 2019.
Jazz Software Ltd is located in Auckland, New Zealand.

Thank you, Robert

Windows Forms
Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
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Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
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