Previously I had a SSL Cert from another company. It expired last night. I purchased a new one this morning, deleted the first one from the server under "Server Certificates" and created a new request. When I clicked "Complete Certificate Request" and put in the new certificate - no problem, it installed.
However, in the browser, whenever I go to the site, I still get prompts in the browser saying that it's not secure. In Firefox, in the dialog that pops up to verify the certificate, I clicked "Get Certificate" a couple of times - it still said invalid, and when I clicked on View Details, the issuer name is that of the original cert, that is expired and deleted.
Only thing I could think of doing was restarting the server. No dice.
Any words of advice?
Did you bind the new SSL Cert to the website? After you've completed a certificate request, you need to go to Sites > Website > in the Action Pane you'll see "Bindings" and make sure to bind the new cert to https:// (aka SSL).
Here's a handy dandy guide: http://www.sslshopper.com/article-installing-an-ssl-certificate-in-windows-server-2008-iis-7.0.html (CTRL F + "Bind the Certificate to a website")
After 2 years, the answer of "Catch" saved my life. After reading millions of forums, my problem was that one web site did not take the new cert automatically. After binnding it manually, everything worked.
"Catch", God bless you!