When trying to debug a web application configured to use IIS Express 7.5 in Visual Studio 2010, I received the following error "Unable to launch the IIS Express Web server"
When running from the command line with the /trace:error switch I got the following
C:\Program Files (x86)\IIS Express>iisexpress.exe /trace:error
Starting IIS Express ...
Initializing the W3 Server Started CTC = 1857831
W3 Server initializing WinSock. CTC = 1857847
W3 Server WinSock initialized. CTC = 1857847
W3 Server ThreadPool initialized (ipm has signalled). CTC = 1857847
Failed to call RegisterModule for dll=C:\Program Files (x86)\IIS Express\loghttp.dll, mod=HttpLoggingModule
Failed processing with hr = 800706ba
Error loading global modules. hr = 800706ba
Terminating W3_SERVER object
Start listenerChannel http:0
Initializing the W3 Server Started CTC = 1858845
W3 Server initializing WinSock. CTC = 1858861
W3 Server WinSock initialized. CTC = 1858861
W3 Server ThreadPool initialized (ipm has signalled). CTC = 1858861
Failed to call RegisterModule for dll=C:\Program Files (x86)\IIS Express\loghttp.dll, mod=HttpLoggingModule
Failed processing with hr = 800706ba
Error loading global modules. hr = 800706ba
Terminating W3_SERVER object
InitComplete event signalled
Report ListenerChannel stopped due to failure; ProtocolId:http, ListenerChannelId:0
Process Model Shutdown called
Waiting for all LISTENER_CHANNELS to stop
Failed to start 'HostedWASStart'. Error = 34022648
HostableWebCore activation failed.
Unable to start iisexpress.
Notes -
I have tried uninstalling and re-installing IIS Express 7.5 a number of times with the same results.
I am running a Windows 7 64-bit machine
IIS Express has been working without issue for a number of months now. The issue only started after restarting my computer this morning.
A couple of suggestions that may help:
How did you reinstall iis-express? If you haven't done so, you can try re-installing Visual Studio 2010 SP1, which contains iis-express.
Try using process monitor to watch the iis-express process to see if there are any permission issues when attempting to start it.
As a last resort, you can disable the logging module by modifying the applicationhost.config, which is located in the %userprofile%\documents\IISexpress\config directory. To do so you will need to comment out a couple lines in the file.
Under the <system.webServer>/<globalModules> element, comment out the line
<add name="HttpLoggingModule" image="%IIS_BIN%\loghttp.dll" />
Under the <location>/<system.webServer>/<modules> element, comment out the line
<add name="HttpLoggingModule" lockItem="true" />
After saving your changes try restarting iis express.