How Windows system upgrades WIN10 without formatting C disk

Many people in the use of Win7, WIN8 system to upgrade to the WIN10 system, but also want to retain the previous C disk in the file, although this is only an upgrade, but it is also a reload system operation, so in the process of upgrading WIN10, format C disk is essential. Today small make up to teach us a little trick, let everyone if in the case of the format C disk, upgrade to the WIN10 system, it sounds like the Arabian Nights, but things always have solutions. Let's take a look at it!

Non-formatted C-Disk upgrade Win10 method

The first step, we first download the ISO format Win10 image files, and then extract the file;

The second step, open the Unpacked folder, find and double-click to run Setup.exe and then follow the prompts to do, but it is recommended to try the local account installation Win10, after the installation is transferred to Microsoft users, install the lower left corner "do not use the Microsoft account login system (not recommended)", Forget Microsoft's recommendation is not recommended.

The above is to upgrade to Win10 method, this method can effectively protect the files in C disk is not lost, is a good choice, to avoid the upgrade after the original file to recover the trouble, improve the efficiency of the work, now and then quickly operate it!