Get your start button back
Well, there is no need to fret about that anymore. Thanks to a heads-up from okorsal, we can show you a simple Registry tweak that will restore the familiar Windows Desktop complete with the Windows 7-style Start Menu. (Thanks also to geek.com for publishing the tweak.)
Registry tweak

Note: This is strictly a tip designed for the Windows 8 Developer’s Preview build of the operating system. It is likely that this tip will not apply to the retail version of Windows 8.
First, start regedit. In Windows 8, if you are in the Metro Interface, you can just type r e g e d i t and that application will appear in the search.

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\ExplorerDouble-click the key labeled: RPEnabled as shown in Figure B.
Figure B



Double-click RPEnabled.

When the Edit DWORD comes up (Figure C), change the Value Data from 1 to zero and click OK



That’s it. Now, when you click the Start Menu on the Windows 8 Desktop you will get the old Start Menu you know an love rather than the tiled screen Microsoft is hoping you will want to know, and still have the Metro desktop interface.