Windows won't boot in AHCI or IDE because of my f*** up. For the love of God someone help.

[ei]

So let me explain what all happened here. I'm 15, built my computer Christmas 2015. All is well, have windows 10 on an SSD along with two HDD. Anyways one day I thought "hey, I wanna get a dual boot hackintosh going" so I did my research. In the end I apparently didn't do enough. Long story short I was poking around in regedit and changed the keys to make my PC boot in AHCI other than IDE. Well I must have put some code in wrong because in the BIOS I tried to boot with AHCI and it gave that error message that it was inaccessible, so I just thought "eh whatever lets go back to IDE". Well, that gave me the same message. So yeah I'm scared now. I put about $1200 total into this build with my hard earned Subway money.

So should I just re-install windows? or is there a less painful option? I tried booting from my other hard drive (it too had windows 10 on it, but it said windows 10 failed to boot on there too)

Please just don't tell me I have to get another motherboard. I'm hoping you gnarly nerds can help me.

 

[DeathWarman]

So let me explain what all happened here. I'm 15, built my computer Christmas 2015. All is well, have windows 10 on an SSD along with two HDD. Anyways one day I thought "hey, I wanna get a dual boot hackintosh going" so I did my research. In the end I apparently didn't do enough. Long story short I was poking around in regedit and changed the keys to make my PC boot in AHCI other than IDE. Well I must have put some code in wrong because in the BIOS I tried to boot with AHCI and it gave that error message that it was inaccessible, so I just thought "eh whatever lets go back to IDE". Well, that gave me the same message. So yeah I'm scared now. I put about $1200 total into this build with my hard earned Subway money.

So should I just re-install windows? or is there a less painful option? I tried booting from my other hard drive (it too had windows 10 on it, but it said windows 10 failed to boot on there too)

Please just don't tell me I have to get another motherboard. I'm hoping you gnarly nerds can help me.

1. Motherboard model?
2. Can you boot into the BIOS (hitting F2 at least.)
3. If your hard drives are IDE, grab some old WORKING computer out from the closet or somewhere, throw the hard drives in, and start backing up data. Same goes for SSD, if that old computer's motherboard is also SATA compatible (being someone who has seen a lot of old computers, this computer would be 2004-2008 to have both IDE and SATA ports on the motherboard.) If it's not SATA compatible too, find another computer you have (maybe 2006+, anything past 2006 99%-of-the-time will have a SATA port on it, hands down.)
4. Is it possible to boot from a USB? Like Ubuntu.
5. If you can provide this information, it may be fixable (to get your OS working fine again. It doesn't sound like anything is broken beyond repair.)