Windows "Run As Administrator" issue

I had looked into several websites in-order to find out why the "run as administrator" need to be select for using visual studio. Any windows user can run visual studio but some code requires Administrator access in order to execute. If possible, alternatives to this code should be pursued. Examples of code operations that require Administrator access are:

*Writing to protected areas of the file system, such as the Windows or Program Files directories
* Writing to protected areas of the registry, such as HKEY_LOCAL_MACHINE

*Installing assemblies in the Global Assembly Cache (GAC)

Generally, these actions should be limited to application installation programs. This allows users to use administrator status only temporarily.

Please follow the link for detailed info User Rights and Visual Studio .

And this is only with win vista,7 and 2008 server.