After you install Windows 10, many users have decided to perform a free upgrade. Unfortunately, не все новинкой довольны, даже после того как система была значительно улучшена. Luckily, for a limited time, we can go back to the earlier version without loss of data.
I must admit, that this time Microsoft is prepared to try and easy to use mechanism. Cope with it even an amateur computer. If spent update, Windows district 10 for some reason did not like, we must turn to the new settings panel. Then go to the Updates tab, and Security, and then in the left menu, select the item Recovery. It is here that we find the desired function, besides computer reset function to the original state and running in expanded mode,, it is possible to restore the previous version of the OS. 
note! If we did a clean install from an ISO image, this option will not be available.
see also: Should I install Windows 10?
In our case, it was enough to select the option, Return to Windows 7. The system will ask for the reasons for our decisions (the survey is not mandatory, However, should report to the corporation, в чем проблема), and after the confirmation procedure will restore the previous version.
Of course, It recommended before surgery to make a backup of all your important files and settings. Theoretically, the process is safe, However, never known, is not it, you will not encounter any unforeseen difficulties however.
Of course, может потребоваться переустановка некоторых программ. Needless to recovery, but, significantly faster, than upgrade - it took less than five minutes during our test, After that we saw the Windows desktop 7 and relieved.
It is worth remembering, that the possibility of the return is the maximum 30 days, after this period the files of the previous version will be automatically deleted, and we will manually install the old system, Restore factory settings or, eg, via mechanisms, provided by the equipment manufacturer.
Please also note something else. After the upgrade, we find the disk directory Windows.old , It takes a few tens of gigabytes. You can not delete it, otherwise go back to the old system will not be possible
