If you want to choose to install Windows
10 from Windows
7 or Windows
8.1, then you must be particularly concerned about the upgrade after installation, before Win7 and Will the personal data of the Win8.1 system be lost, can it be saved? Let's take a look at the answer given by Microsoft:
Win8 or Win8.1 upgrade Win10
will be able to retain Windows settings, personal files and most applications;
One point can be confirmed from the "Select the content to be retained" screen displayed by Microsoft Chiefs during the early morning installation of Win10 Technology Preview from Windows 8.1. As shown in the figure:
As you can see from the figure, you can choose to keep Windows settings, personal files and applications.
WinRT or WinRT 8.1 upgrade Win10
Microsoft told us that Win10 Technology Preview will not run on Windows RT system, so there is no problem with Windows 10 upgrading Windows 10.
Win7 Upgrade Win10
Upgrading from Windows 7 and installing Windows 10 can also preserve Windows settings, personal files and most applications.
Windows Vista upgrade Windows10
This does not retain any data, you must install the Win10 system completely.
Notes
Because the Win10 technology preview that Microsoft provides downloads is only available in English, Simplified Chinese and Portuguese, so if you are currently using Win7/Win8/Win8.1 system Language is not one of these three languages, so you will only be able to keep your personal files when you upgrade, and you won't be able to keep your Windows settings and applications. And the language pack or language interface pack (LIP) installed in the system will also be deleted when installing the Win10 technology preview version
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