>Hi,
>
>I installed an ASP.NET application on a new VM. I did the same steps as 100s of the times before. Usually I test the application by browsing test.htm from the IIS Manager. Then I go to test other pages.
>But in this case, when I try to browse test.htm (which has just one line) the browser reports error:
>

>Service Unavailable
>HTTP Error 503. The service is unavailable
>

>
>Where do you suggest I look at the IIS Manager or the server?
>
>TIA

Have you tried accessing the web server from a workstation within the same network? Browsing the Web on the server itself is often a hit-or-miss affair (due to restrictions if you're logged in with administrative username -- *especially* Administrator ).

And of course, there's the next stupid question -- did you make sure that the web site was indeed started?

Another stupid question -- was this website set up with HTTP or HTTPS? If the latter, did you make sure that the SSL/TLS certificate was properly registered? If the former, double-check on the address bar of the Web browser that you're trying to access with http rather than https (some Web browsers will default to https)

YASQ (Yet Another Stupid Question) -- have you tried navigating in File Explorer and try duoble-clicking on the test.htm? Just want to verify that it does open with a Web browser. If it opens in some other application, you may want to double-check that the file is indeed named "test.htm" rather than something like "test.htm.txt" (i.e. make sure that you're not running afoul of default configuration of Windows that hides the file extension).