To install Windows 10 using an earlier versions of Windows, you could wait and use the default software updater for an automatic installation. Or you could do it now by yourself using this official tool, which allows you to download an ISO image and even create a DVD or USB installation to use on other computers.
When you open the program, it will ask you whether you want to update your current Windows system or create an installation disc. Otherwise, you'll be able to choose where you want to save the new files, which will replace their older versions.
Keep in mind that the Windows 10 version that gets installed depends on what you had previously. So, if you have Windows 7 Starter, Home Basic, Home Premium, 8, or 8.1, you'll get Windows 10 Home. If you have Windows 7 Professional, Ultimate, or any of the other 8 or 8.1 Pro editions, you'll get Windows 10 Pro. Either way, keep in mind that you have to enter in the information related to your operating system's legally registered version.
21 reviews 
Comments
Very good
Cool OS
awesome tool
The problem is that an error code constantly appears. Tried all possible solutions, but it's still the same.
so good
Can we operate the mobile by touching?