Upgrading from previous version of Windows to Windows 8 consumer preview

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You can upgrade to Windows 8 consumer preview from Windows Vista, Windows 7, Windows 8 developer preview but you may not be able to keep all the files, programs or settings. Currently complete upgrade to Windows 8 consumer preview is only supported from Windows 7 and you can’t even directly upgrade from Windows 8 developer preview. Here are the supported paths of upgrade-
 
Current operating system   ■ What you can keep   

Windows Developer Preview 

   ■ User accounts and files
 
Windows 7   

   ■ Programs
                   
   ■ Windows settings
                   
   ■ User accounts and files
 
Windows Vista   

   ■ Windows settings
                         
   ■ User accounts and files
 
Windows XP   

   ■ User accounts and files
 

Up-gradation to Windows 8 consumer preview from Windows XP and Windows 8 Developer preview is only possible via migration. We would shortly write an article detailing how to upgrade from Windows 7 to Windows 8 consumer preview.