First, create a new folder on your Windows 8 desktop (right click on the desktop and select New – Folder)
Open the folder, right click in the blank area and select New – Shortcut. Enter the below command in the text field. explorer.exe shell:::{2559a1f8-21d7-11d4-bdaf-00c04f60b9f0}
Click “Next”, then give a name (for example, Start) to the shortcut and click Finish.
Now, right click on this shortcut icon, select Properties, and click the “Change Icon” button. Select a suitable icon (you can download a suitable start button ico file from the Internet) and click “Apply” to save the changes.
Finally, right click this new icon and select “Pin to Taskbar”. Drag this start button to the left side of the taskbar.
When you click this Start button, the Windows 8 Apps screen will appear as shown above.