Yes, you can upgrade to Windows 8 Consumer Preview from Windows Developer Preview, Windows 7, Windows Vista, or Windows XP, but you might not be able to keep all of your files, programs, and settings. The following table shows what you can keep during an upgrade depending on the current version of Windows running on your PC:
Ha Win7ről frissítesz, ezek maradnak meg: Programs;Windows settings;User accounts and files.
