Windows several systems upgrade Win10 different

Many people know that Win10 can upgrade Win10 directly. It should Win7, Win8, Win8.1 Win10 upgrade process is about the same, the main difference is that Win7, Win8, Win8.1 upgrade different Win10 and Win10 preview:

here small Let's know the simple description.

1. Upgrade from Win7/Win8/Win8.1 system to win10

If you are a Microsoft authorized user before, then you can upgrade to win10 official version for free (such as win8 regular version) Can be upgraded to win10 regular version for free) and permanently used;

If you are using an unauthorized version of win7.Win8, you still need to purchase the right after upgrading win10 system

2, from Win10 preview upgrade to win10

The preview version can be upgraded directly, but if you want to use the official version after the upgrade, you will need to pay for the Windows 10 license. If you are willing to participate in the Windows Membership Program Test Preview, you do not need to purchase it.

3, genuine authorized win7/win8/win8.1 upgrade to Win10 preview version after upgrading win10 official version

According to Microsoft's instructions, this is also free upgrade and permanent use, but now Not clear, but we can first return to the previous version of windows and then upgrade the official version of win10.

Note: Win10 member test users need to register to join, and the price may be that you will keep installing test updates, when Microsoft is a mouse.

The above is the difference between Windows system upgrade Win10, Win7, Win8 can directly upgrade Win10, Win10 preview version should be returned to the original system. Now it's reversed. It seems that Windows still has preferential treatment for Win10 preview users who are willing to give them a mouse.