How to install windows 7 in dual boot on Satellite M840?

Hello

I've had this laptop M - 840 a week ago, pre-installed with windows 8. I can't replace the operating system with windows 7 as most of my Win 8 incompatible applications. I'm tired of clean install - does not work. I created a NTFS partition and tried to install win 7 on the new partition, but this isn't just beyond 'Windows startup screen. Any help in this regard will be highly appreciated.

Kind regards
C4I - OPS

>. I'm tired of clean install - does not work

To install Windows 7 on the laptop of Win8, you must change some settings in the BIOS.
First of all, you have to disable startup secure in the BIOS.
Second pass of the UEFI BIOS for the CSM and save the changes.

Now you should be able to install Win 7

But before doing this, I recommend that you create the recovery media (Flash disk to USB memory or recovery Toshiba

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