Certificate may not have a private key that is capable of key exchange or the process may not have access rights for the private key

When we add certificate into IIS\Server Certificates, please make sure you have given 'Read' permission for the users that's hosting your web service/site.

Start MMC and add the Certificate Snap-in, selecting the right container owner for your SSL certificate. Find the certificate (it's probably in the personal store), right click on it and choose All Tasks > Manage Private key. Grant read access to the private key to the user hosting your service.

500.0 Internal Server Error - aspnet_isapi.dll failed in IIS 7.5

If you experience '500.0 Internal Server Error - aspnet_isapi.dll failed' even after trying all possibilities like 'aspnet_regiis -i' etc..., just uninstall IIS and Re-install again, it just works. It is Microsoft:)

I faced this when i installed Framework 4.0, so uninstalled IIS 7.5/Framework4.0 and re-installed both.

Error message when you visit a Web site that is hosted on IIS 7.5: "HTTP Error 404.17 - Not Found"

This article might help, but we need to look for three things particularly

configure the following settings to match the handler requirements:

• .NET Framework Version
• Enable 32-Bit Applications
• Managed Pipeline Mode

BadImageFormatException in Windows 2008 R2 Server

I successfully imported PowerShell Script written using C#, but it throws System.BadImageFormatException when i tried to execute it. After spending few hours, figured out my Powershell Script was compiled for x86, so i should have used “c:\Windows\SysWOW64\WindowsPowerShell\v1.0”.