Simply put this in a html/aspx file and run. It will show you all the .net versions installed.

You may get a Page cannot be found message when you browse aspx pages in a Windows Server 2003 environment.
That is because in Windows 2003, all the webservice extensions are “Prohibited” by default to ensure security.
To resolve this, do the following steps:-
1. From your Run command, type inetmgr and press enter.
2. Expand the appropriate nodes in the IIS to locate the “Webservice Extensions” Node
3. Click on the same.
4. You will find a list of “prohibited” extensions in the right.
5. Click on ASP.NET and “allow” it
That should resolve this issue.
If ASP …