My system is Win 7 Pro SP1, Visual Studio 2010 Pro Sp1 and IE9.I also have all actual Windows updates installed.
For quite some time I had problems to start ASP.NET projects from Visual Studio 2010 Professional. IE and VS were freezing. I read about the debug bug and installed SP1. The freezes are gone, but I still can't run aspx pages from VS and view or debug them with IE. (I have no problem to debug WinForms from within Visual Studio.)
My system is Win 7 Pro SP1, Visual Studio 2010 Pro Sp1 and IE9. I also have all actual Windows updates installed.
Now when I debug or start without debugging IE only displays a white screen and in the status bar "waiting for answer of localhost". The address bar shows the correct page. The CPU goes up and the fan starts, but the page is not displayed. After some minutes IE displays that the webpage can't be displayed. I can close IE or stop the debugging in VS or stop WebDev. The apps don't freeze.
If I type in the local address in the browser address bar "localhost/path..." all web applications run fine. (First I was not able to run the applications entering the page in the address bar due to missing access rights. I keep websites in the websites library insted of inetpub) When I added IUSR and IIUSR... they run fine directly from the browser. Still I can't run or debug any application with IE out of Visual Studio.
I created a new web application with ASP.Net 2 and 4 inside of Visual Studio. Still I wasn't able to debug or run them from within Visual Studio.
I tried turning of AV and Firewall (GData) and run VS explicit as Administrator—no difference. I tried to set the local IIS as the server, but still IE ramps up the CPU and IE only shows white. So the same problem occurs independet of using IIS or WebDev. If I enter the same URL during IEs unresposiveness in a new browser window the page is displayed.
Another issue popped up: When I switch back to default server and run the page from VS the address bar doesn't show the page name and path anymore. Rather it shows the root folder of the web site project only. Even if I switch back to custom server IE only shows the root folder (localhost/virtdir). I need to restart VS to have it work again.
I tested attaching the debug process to the IIS worker process. This works fine. The issue occurs only when I start the aspx pages from within Visual Studio.
I then tested to use FireFox (v16) as the default browser. Debugging works fine. It seems to be a problem with IE or its settings since I installed SP1.