Hello World problem for beginner

[eluser]Rabbi[/eluser]
OK thnx. Sorry for disturbing you guys.

Nothing is working. Btw, i am now debugging the main "index.php".

Code:

if (strpos($system_folder, '/') === FALSE)
{
    if (function_exists('realpath') AND @realpath(dirname(__FILE__)) !== FALSE)
    {
        $system_folder = realpath(dirname(__FILE__)).'/'.$system_folder;
    }
}
else
{
    // Swap directory separators to Unix style for consistency
    $system_folder = str_replace("\\", "/", $system_folder);
}
//edited my RABBI(me)
//i edited this line for seeing the $system_folder output
echo $system_folder;

It is showing this: "C:\Inetpub\wwwroot\ci/system"

Is it correct actually?

In Internet Explorer, this link:
http://localhost/ci/index.php/blog/index
is telling that "The page cannot be found".