Windows 7 uses its own intelligence to arrange your windows. For an example, when you drag a window to the top of the screen it automatically maximizes. But if your wanna master Windows 7 at your behest, you need to disable this arrangement. Let's see how to go about it

1. In the Start Search type regedit to edit the registry

2. Go to HKEY_CURRENT_USER\Control Panel\Desktop

3. Set WindowArrangementActive value to 0, and reboot

Now your windows will behave as in the earlier versions.