Signtool error: No certificates were found that met all given criteria with a Windows Store App?

Question

I\'m trying to sign a Windows 8 appx package with a pfx file I have. I\'m using a command like so:

signtool.exe sign /fd sha256 /f \"key.pfx\" \"app.appx\"
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Answer 1

When getting this error through Visual Studio it was because there was a signing certificate setup to match the computer it was originally developed on.

You can check this by going to the project properties > signing tab and checking the certificate details.

You can uncheck "Sign the ClickOnce manifests" to disable signing.

If you don't want to turn this option off you will have to install the certificate.