升win8使唔使backup?

會唔會有個window old    save哂個win7?

Files no need to backup, you should at least perform a Windows Backup for the OS
FAQ:
Can a user uninstall Windows 8 Consumer Preview? According to Microsoft, the answer is no. "To go back to your previous version of Windows, you'll need to reinstall it from the recovery or installation media that came with your PC."

As far as upgrading to Windows 8 Consumer Preview, those on the Windows 8 Developer Preview can keep their user accounts and files, while those on Windows 7 can keep their programs, Windows settings, as well as user accounts and files. Windows Vista users will not be able to keep their programs, but can keep their Windows settings, as well as user accounts and files. Windows XP users can only keep their user accounts and files.

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等得就等啦, 六月頭就出 Windows 8 Release Preview

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