Addons are not installing I am trying to install various addons to no avail. I have tried many, and they can't all be buggy.

I go to settings, click install from file, choose file, then select install from file again. Search for the addon and it isn't there. What am I doing wrong? I have also copied all of the content from the downloaded file and put it in a new file and saved as name.py. Still nothing shows up. And yes, the document starts with what it should start with, not html.
If your addons are zip files, then it is best to unzip them and place them in the addons directory. For Windows it is (where you installed Blender)/Blender Foundation/Blender 2.75/2.75/scripts/addons directory. Put your addons there, then restart Blender and it will show up in the User Prefs.