Errores 0X81000306 y 0X8000301 [Runtime error]

Tengo Windows Messenger y MSN Messenger y me han aparecido los siguientes
errores:
El primer error que me ha dado ha sido 0X81000306 ha aparecido el
"solucionador de problermas de conexion" de MSN y me ha aparecido ese texto.
Más tarde ha aparecido el siguiente error 0X08000301
¿Pueden indicarme qué es lo que puedo hacer para resolverlo?
Gracias por vuestra ayuda
Howard

Server Error in '/' Application.

Runtime Error
Description: An application error occurred on the server. The current custom
error settings for this application prevent the details of the application
error from being viewed remotely (for security reasons). It could, however,
be viewed by browsers running on the local server machine.

Details: To enable the details of this specific error message to be viewable
on remote machines, please create a <customErrors> tag within a "web.config"
configuration file located in the root directory of the current web
application. This <customErrors> tag should then have its "mode" attribute
set to "Off".


<!-- Web.Config Configuration File -->

<configuration>
<system.web>
<customErrors mode="Off"/>
</system.web>
</configuration>


Notes: The current error page you are seeing can be replaced by a custom
error page by modifying the "defaultRedirect" attribute of the application's
<customErrors> configuration tag to point to a custom error page URL.


<!-- Web.Config Configuration File -->

<configuration>
<system.web>
<customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/>
</system.web>
</configuration>