Error : System.Security.Cryptography.CryptographicException: The system cannot find the file specified

Change the Identity of the application pool to "NetworkService".

Required components of IIS7.0 for installing SQL Server 2005 on Windows 7

When you try to install SQL Server 2005 on Window 7, you may receive the following warning message for the IIS Feature Requirement item on the System Configuration Check page in the SQL Server 2005 Setup program:

Microsoft Internet Information Services (IIS) is either not installed or is disabled. IIS is required by some SQL Server features. Without IIS, some SQL Server features will not be available for installation. To install all SQL Server features, install IIS from Add or Remove Programs in Control Panel or enable the IIS service through the Control Panel if it is already installed, and then run SQL Server Setup again. For a list of features that depend on IIS, see Features Supported by Editions of SQL Server in Books Online.

This problem occurs because not all the IIS 7.0 components that SQL Server depends on are installed on the computer. The following table lists the affected components.

Component	Folder
Static Content	Common HTTP Features
Default Document	Common HTTP Features
HTTP Redirection	Common HTTP Features
Directory Browsing	Common HTTP Features
ASP.Net	Application Development
ISAPI Extension	Application Development
ISAPI Filters	Application Development
Windows Authentication	Security
IIS Metabase	Management Tools
IIS 6 WMI	Management Tools