If you are looking to disable the Metro user interface in Windows 8 then simply follow this step by step guide and your good to go!
Windows 8’s New Metro UI
For most traditional Windows users, Microsoft’s decision to saddle Windows 8 with tablets and touchscreen friendly modern interface, officially known as Metro UI, has proved quite annoying.
While making it usable for tablets – trying to use mobile-centric apps and live tiles using a mouse and a keyboard is a frustrating experience. One option is to upgrade to Windows 8.1 but there is still a method to restore some traditional features to Windows 8 itself.There is no button that disables all the features of the metro UI completely, but with a little tweaking, you can work your way around it.
First, you need to find alternatives to the essential windows 8 native apps that use the Metro UI. For example,thunderbird, which is a free mail client, is a good replacement for the sometimes slow Windows 8 messaging app.
Download and install SkyDrive desktop app which is more versatile that its modern counterpart and for all your music and entertainment requirements, VLC is works with pretty much everything.
After you have these apps installed, you need to make them your default programs for their associated file types, to avoid being dragged and dumped to the Metro UI by the native apps.
Either search for “Default Programs” on the modern start screen, we will banish it later, or click Control Panel -> Programs -> Default Programs -> Set Your Default Programs.
You will see a list of all the programs installed on your PC. Click the desktop apps that you previously installed and set them as the default options for their associated file types.
Finally, to get the old Windows 7 start button with its traditional menus, you need to install a third part start button replacement. You have a few options at hand here apart from upgrading to Windows 8.1.
For open source lovers, you can install Classic Shell which is available from Sourceforge. For proprietary apps, you can use Start8 or start is back. These apps will enable you to jump straight to your desktop when your PC boots and also put the shutdown menu where it used to be giving you the more traditional Windows 7 desktop UI experience on a Windows 8 machine.