Where is aspnet_regsql.exe

MSDN says

Aspnet_regsql.exe file is located in the
[drive:]\%windir%\Microsoft.NET\Framework\version folder on your Web server

But where exactly is that?

Here's an example of an absolute path of my aspnet_regsql.exe

C:\\Windows\Microsoft.NET\Framework\V2.0\aspnet_regsql.exe

Based on that example, it may be easier for you to determine where exactly your server's aspnet_regsql.exe file is. Be sure to take note of your server's OS (Framework vs Framework64) and its version.