I do not use AJAX on my server. However, we have this message that occurs at various occasions on the event log:

WebHost failed to process a request.
Sender Information: System.ServiceModel.Activation.HostedHttpRequestAsyncResult/36181605
Exception: System.Web.HttpException: The service '/AjaxService.svc' does not exist. ---> System.ServiceModel.EndpointNotFoundException: The service '/AjaxService.svc' does not exist.
at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath)
at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath)
at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.HandleRequest()
at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.BeginRequest()
--- End of inner exception stack trace ---
at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result)
at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result)
Process Name: w3wp
Process ID: 7292

What can I do to avoid that? Is there something that got installed that I have to remove?