How to roll back Win7/Win8.1 system after upgrading Win10 official version

Microsoft officially released the Win10 operating system on July 29th. Although Win10 has many advantages, it is inevitable that users will not be able to adapt after the completion of the promotion. Some users even have continuous restarts, blue screens, and updates after performing the upgrade. Continue to wait for the question, then how to roll back to the Win7/Win8.1 system after upgrading the official version of Win10. Microsoft also thought of this, so after upgrading to Win10, if you are not satisfied, you can roll back to Win7 or Win8/8.1, but the premise is not to delete this file!

In fact, Microsoft provides users with A very simple way to get back to the old version from Windows 10, but this is also time-limited.
Microsoft said that after upgrading to Windows 10, users rolled back to the old version of the system for only one month. In other words, after completing the Windows 10 upgrade and using it for a month, you will not be able to return to the previous version of Windows. The only version is the new installation system.
It should be noted that if you downgrade to the previous version of Windows, you must find the Windows.old folder in C:Windows.old. If you accidentally delete the Windows.old folder, then you will not be able to perform the downgrade.

At the same time, before performing a downgrade, you need to make sure that all your data is backed up to an external hard drive or to a cloud service.
The steps to get back to Windows 8.1 or Windows 7 from Windows 10 are simple. Users simply go to “Settings  select“Update & Security", click “Restore”, you can see “return ” to the previous version of the operating system version of the button.
After the downgrade operation is completed, if the file is lost, the backup file can be used for recovery. If the system is inaccessible because of the downgrade and mistakes, it will be more difficult to recover from the system's own system. Perhaps you can find the computer download system installation file and use the U disk or CD-ROM main installation system.