downgrade win 8.1 to win 7

[Horfoex]

I have bought a new PC with pre-installed Windows 8.1 (64). The Win 8.1 is installed on 128 GB SSD.
But I want to install my old Windows 7 (64) with my License Key especially for MS FlightSimX.
What can I do ? Can I format the SSD and so de-install the Win 8.1 and then install my old Win 7 (64bit) on SSD ? Is it OK ?? Please help me ! Thank you everybody ! I am 80 years old...

 

[delaro]

Yes you will need to Format to do so, the downgrade option isn't so great.

Boot to Bios and toggle Secure boot, most preloaded machines wont let you boot from Legacy devices.

Boot back into Winblows 8

Grab a USB stick and install KillDisk
http://software.lsoft.net/killdiskfloppysetup.exe

Restart and get into the boot manager "F8" or "F2" start tapping it a second after you hit the power button.

KillDdisk will boot off the USB into dos and allow you to format, after that just install Win7 normally.

 

[kanewolf]

BEFORE you start this downgrade, make sure there are Windows 7 drivers for the hardware!! Download them BEFORE you start... Some new hardware -- especially laptops don't have drivers for Win 7.