I'm trying to install Windows 7 64-bit on a Lenovo Ideapad, the 100S series, which currently has Windows 10 on it. The laptop lacks an optical drive, so I'm forced to install it off a USB stick, but I can't get it to work.
I've created a bootable USB stick with Windows 7 for Legacy mode using Rufus (using this guide: http://www.fit-pc.com/wiki/index.php/How_to_install_Windows_in_Legacy_mode), and set the laptop to Legacy mode in the BIOS. I've also set the correct boot sequence in BIOS, setting the USB stick as boot order 1. Yet the laptop ignores the USB stick and just boots Windows 10 as usual. I've also tried hitting F12 to reach the boot menu to attempt to select the USB stick manually from there, but for some reaso it's not even appearing as a boot option in that menu, unlike the boot order in BIOS where it does appear.
I've also changed back to UEFI mode and installed the Windows 7 ISO to USB using this guide http://www.fit-pc.com/wiki/index.php/How_to_install_Windows_in_UEFI_mode to no avail.
I've also (with the laptop still set to UEFI mode) followed this guide, with same results:
I've tried several USB sticks, all of which I know are good and functional.
What could be the reason for it not working?
Please any suggestions are welcome. I must get Windows 10 off and Windows 7 onto this laptop a.s.a.p.
Thank you for reading.
Edited by krs000a, 13 June 2018 - 07:37 AM.