I created a self-signed certificate on Windows 7 and deployed a web site with this certificate just to try it out.

When I configured the HTTPS endpoint and visit the site with HTTPS protocol, I get the "not a trusted cert" error as expected.

Then I try to make this cert a trusted one on my machine with following PowerShell code:

$cert = (get-item cert:\CurrentUser\MY\1D5B3DEF207B70C7426953315A8C06EB38E50FAA)
$store = get-item cert:\LocalMachine\Root

It didn't work, I still get the same error. Then, I delete it from trusted certs list and tried with the below code again:

$cert = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2("c:\certs\foo2.foo.cc.cer")
$store = get-item cert:\LocalMachine\Root

That didn't work either. What am I missing?

1 Answer 1


Your code looks fine and I'm assuming you're not getting any errors either. A bunch of things to check:

  • Open the certificates MMC and make sure your cert is being added.
  • Check the common name and subject alternative names of the cert. The domain of the URL you put in the browser has to match one.
  • Make sure the certificate not after date is not in the past.
  • Make sure you are using a web client that uses the Windows trust store. Firefox has its own.
  • Compare the certificate SHA1 hash from the browser to the one you are installing to make sure its the right one.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.