How can I change the settings to get the right privillages, if that's the issue?

Okay, I've recently installed apache to my laptop (Windows Vista). This is the first time I've tried anything like this and I don't have much knowledge with apache or computers overall, however I'm doing this to learn.

When setting it up I followed the installation process and as I tried to change the documentroot through the httpd file it won't work. It says "Cannot create C:\Program Files\Apache Software Foundation\Apac he 2.2\conf\httpd. conf...