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Error 'Certificate installation was unsuccesfull!'
I see this error message when collecting codesigning certificate

Certificate installation was unsuccesfull!

Error: -2146885628 Your certificate appears to be already installed

Solution:

The Code signing certificate can only be installed on the same machine from where you applied.

Do not install the codesigning certificate to different machine, unless the private key has been backed up successfully.

The Private key will be stored in the default directory C:\mykey.pvk.

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