Having trouble installing Windows 7 Ultimate due to a *Load Driver*

Hello there! Let me describe my problem: I have a HP Pavilion 11-n010sn x360 convertible Laptop. It had Windows 8.1 on it, and most of the updates failed to install, then I updated to Windows 10, still some of the updates had the same effects. Nevermind, here is what I did on it: I wanted to install on a new 75GB Partition Windows 7 Ultimate x64 SP1.
I took the ISOs from an Windows ISO downloader from *cough*heidoc(dot)net*cough*. It ain't having any piracy, just a free downloader that gives you download links from Microsoft. Meh, I think I broke one rule there, nevermind, The issue is that I had an Load Driver error, because it couldn't find the CD/DVD Driver. If you look at the Device Specs, *caps* there is no *censored* driver for any disks */caps*.
I tried changing the USB device with the installer to somewhere else.
One big issue is my BIOS/UEFI. It has just some settings for Virtualization Tech., Secure Boot, and CSM. *caps* nothing else! */caps*. That makes me because I cannot change to boot from USB 3.0, and other stuff. BIOS Version: Insyde F.20 (or something like that). I do think, however, that I can download a driver, that is not compatible, or that has the most success rate, and to download it to the computer. Then, I could load it there, and the installation should be normal...

What do you think? Will I get the help to install Windows Seven on my Laptop?


(P.S.: If it works, I will activate it with a Genuine Key. Not gonna tell you the key number, tho.)

SSD is on factory GPT. To convert to MBR, I have to erase my system, which I have to keep, because I do not have a CD/DVD drive. I do not have it installed. I do not know how to say this, but *caps* I do not have any CD/DVD related crap on my laptop */caps*. I can disable Secure Boot and Activate CSM. Not able to change advanced stuff, like, ACHI, SATA, whatever, and Legacy/UEFI. It is too simple and I won't risk anything. All I need is to keep Windows 7 and 10 installed on GPT SSD drive I have.

HP Pavilion 11 x360 - HP Support Forum - 4264942

Is it possible to install Windows 7 Home Premium on a HP Pavilion 11 x360 that comes with Win8.1?

Make sure that in "System Configuration" > "USB3.0 Config in Pre-Boot" which is set to "Enabled". This must be set to "Auto"

Disable secure boot & ENABLE Legacy:
HP Notebook PCs - Cannot Start Notebook Computer From a Bootable CD or DVD | HP® Customer Support

Additionally, as the hard drive is most likely partitioned as GPT, you must boot using the UEFI-Internal CD/DVD or UEFI-USB Key/Drive to install Windows on a GPT partitioned disk.

Power on or reboot the computer and tap F9 or ESC and then F9 when prompted. Select the UEFI boot source you are using and press ENTER.

I am trying to download some Seagate Hard Disk drivers from the HP's site on my model, but I find that the drivers are in a *.exe format. Any clue how to actually get the drivers to be in a *.cab format? (To be honest, I have no idea how driver files are. Manufacturers just make their stuff so you cannot install any other OS, so you need their drivers, but they are in a *.exe format.)

Let me clarify the BIOS: It has the following: Time/date, log, password for turning it on/entering bios, VT (virt. tech.), Secure Boot, Legacy Support with CSM, Boot order, other Intel stuff that is quite useless.
It does NOT have the following: SATA/AHCI toggle, Usb 3.0 Boot Support On/Off toggle, Overclocking support, Pretty much what an ASUS BIOS should have (tons of settings). Anything that could help me will be greatly appreciated.

If there is nothing else I can do, should I proceed and convert my drive to MBR?