17 R4, changed fans, lost hard drive, legacy, no WiFi or USB

I am SOOO frustrated now! I simply changed the fans on my laptop and when I restarted it said there was no bootable drive. I tried EVERYTHING I could find to fix it and finally took the hard drive to a comp repair and they said the partitions were deleted. I had a SSD drive in another computer (with windows 7 on it) and we put it in my alienware. It still would not boot until we changed to Legacy. I finally thought I had it going and went to reinstall my windows 10 from Dell and I have NO wifi or USB drivers! I moved the SSD BACK to the old computer, downloaded the drivers for both for windows 7 and then moved the SSD BACK to the alienware to only have each driver say the computer was not compatible with the drivers. I tried to switch back to UEFI to see if that helped and in UEFI, it just goes back and says there is no bootable operating system. HOW IN THE WORLD am I supposed to get my windows 10 and Dell drivers BACK on this thing if I don't have drivers and downloading drivers onto the hard drive with another computer just says they can't be installed on my alienware computer. I am BEYOND frustrated with this thing. There was NO reasons the fan should have ever gone bad already to begin with, but I was trying to just move on but this is ridiculous now! Someone please help! The warranty ended on March 14, 2019.