Installation af ASP.NET

Jeg har installeret IIS, Data Access components osv.. Problemet er jeg hele tiden får følgende fejl, når jeg prøver at tilgå en default.aspx fil i www biblioteket:

Exception Details: System.Security.Cryptography.CryptographicException: CryptoAPI cryptographic service provider (CSP) for this implementation could not be acquired.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 

Stack Trace:


[CryptographicException: CryptoAPI cryptographic service provider (CSP) for this implementation could not be acquired.]
  System.Security.Cryptography.RNGCryptoServiceProvider..ctor(CspParameters cspParams) +316
  System.Web.HttpRuntime.SetAutogenKeys(HttpContext context) +97
  System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +340

[HttpException (0x80004005): ASP.NET Initialization Error]
  System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +906
  System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +128