If you want to install the SSL cert (PKCS7 type), You may receive the following error
You can ignore this error. Just click cancel. This is a known bug in IIS7.
Solution for this is to import the cert manually.
(1) Start up Cert Manager
-Start > Run: mmc.exe
-Menu: File > Add/Remove Snap-in
-Under Available snap-ins, select Certificates and press Add.
-Select Computer Account for the certificates to manage. Press Next.
-Select Local Computer and press Finish.
-Press OK to return to the management console.
(2)Import the Cert
-Go to Certificates (Local Computer) > Personal > Certificates
-Click on the More Actios on Actions tab on right corner
-All tasks > import > next > select the cert
-Select the option ““Automatically select a certificate store based on the type of certificate” > Finish
– you will see the Cert appear on the list and edit the Friendly name will do
(3)add into the site and edit binding
If you no sure with the step, you can refer to the url (Edit Bindings section)