How to return Windows 7 system from windows10 operating system

The introduction of Windows 10 also takes into account the old system users, so set a menu to roll back the old system, but this is a conditional function (one month time limit), obsolete may be invalid. Note: The premise is that this Windows 10 operating system is from the old system upgrade (Windows 8.1, 7 operating system) come from, otherwise it is invalid.

Press Windows, click on the three bars on the top left → Settings.

Settings → Update and Security.

Update and Security → Recovery → Rollback to Windows 7 → Start.

Note that the instructions below, after upgrading to Windows 10 operating system, this feature can only be valid within one month.

Followed by Microsoft to do a user survey, choose a reason not want to use Windows10 → Next.

Then, to maintain the power flow, especially laptops, be sure to use the power adapter (try not to use the battery). Obviously, some programs may need to be reloaded.

Prompted before setting the login password, the recovery will require the use of the password, if not the correct password, may not enter the system.

Confirm, click the button to return to Windows 7.

The entire return process is very slow, saying that as long as the proportion of loading system is much slower! This should be mentally prepared, try not to halt halfway, so that one of the two systems can not get in.