The final Step of this guide is to install arm9loaderhax and setup Luma3DS to run just milliseconds into the boot. Dette blir oppnådd ved å bruke SafeA9LHInstaller fra [AuroraWright](https://github.com/AuroraWright/).
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Dette vil installere [AuroraWright's gren](https://github.com/AuroraWright/arm9loaderhax) av arm9loaderhax.
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Vi kommer også til å sette opp muligheten til å starte payloads fra arm9loaderhax, noe som gir oss muligheten til å unbricke SysNAND fra situasjoner som normalt ville bricke oss ved å gjenopprette fra en sikkerhetskopi.
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**Du kan ikke bruke en annen konsolls OTP det vil GARANTERT føre til en bricket enhet.**
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#### Oversikt over trinnene
I denne seksjonen, vil vi gå gjennom prosessen som alle de andre trinnene har ledet opp til: å faktisk installere arm9loaderhax.
This is nearly the best possible kind of device exploit because it is permanently installable into the NAND firm partitions, and runs before most of the OS loads, allowing it to not only work on *all* versions once installed, but also protect itself and recover from most situations that would brick a non-A9LH 3DS such as a nonfunctional home menu or bad title install.
Filen `arm9loaderhax.bin` er det som startes av arm9loaderhax, etter at den er ferdig med å laste NAND, og kan være enhver gyldig arm9 payload. This file can be replaced at any time, although Luma3DS allows for the launch of other arm9 payloads using the Luma3DS chainloader.
In this case, we use Luma3DS by [AuroraWright](https://github.com/AuroraWright/) to boot a patched SysNAND directly, allowing us to completely bypass the need for any kind of EmuNAND, vastly simplifying the usage of a hacked 3DS in addition to saving SD card space.
Once arm9loaderhax is installed and Luma3DS is setup with the correct options, we then restore our previous backup.
During this process, we also setup programs such as the following:
+ **FBI** *(installs CIA formatted games and applications)*
**Ensure you are using an SD card that is not corrupted!**
**If you use a corrupted SD card without fixing it, you may BRICK!**
**Hvis du tror SD-kortet kan være korrupt, kan du sjekke etter feil med, [H2testw (Windows)](h2testw-(windows)), [F3 (Linux)](f3-(linux)), eller [F3X (Mac)](f3x-(mac))!**
1. **If it exists, copy the `/files9/` folder on your SD card to a safe location on your computer and back it up to multiple locations (such as online file storage); the files inside could save you from total data loss if you break your system**
2. Opprett en mappe kalt `cias` på roten av SD-kortet hvis den ikke allerede er der
6. Kopier _innholdet av_ SafeA9LHInstaller `.7z` til roten av SD-kortet
13. Opprett en mappe med navn `luma` på roten av SD-kortet
14. Opprett en mappe med navnet `payloads` i `luma` mappen på SD-kortet
15. Kopier `Hourglass9.bin` fra Hourglass9 `.zip` til `/luma/payloads/` mappen på SD-kortet og endre navnet fra `Hourglass9.bin` til `start_Hourglass9.bin`
17. Kopier `aeskeydb.bin` til `/files9/` mappen på SD-kortet
18. Kopier `DspDump.3dsx` til `/3ds/` mappen på SD-kortet
19. Kopier _innholdet av_ `fbi-2.4.2-injectable.zip` til `/files9/` mappen på SD-kortet
##### Seksjon I - Installere arm9loaderhax
1. Sett inn SD-kortet i konsollen
2. Do the steps for installing arm9loaderhax on your device:
+ If you get the error "This service is not available in your region", use the System Settings to set your device's country to match the NAND region you installed with 2.1.0 ctrtransfer
+ If you get another error, [follow this troubleshooting guide](troubleshooting#ts_browser)
+ If you get a glitched screen, [follow this troubleshooting guide](troubleshooting#ts_safe_a9lh_screen)
+ If you are on a 2DS or New 3DS and Wireless Communication is off, you can re-enable the wireless by removing the battery and unplugging the charger for several seconds then booting back up
+ Copy your console specific `otp.bin` from the `/a9lh/` folder on your SD card to a safe location on your computer and back it up to multiple locations (such as online file storage), then reinsert your SD card into your 3DS
+ This will increase the framerate of many games, but may cause instability in others
+ If some games do not work properly, disable this option and try again
4. Press (Start) to save and reboot
+ If you get a black screen, just continue to the next section
+ If you get a "Failed to mount CTRNAND" error, just continue to the next section
##### Section IV - Restoring the System
If, before following this guide, you already had an EmuNAND setup and would like to move the contents of your previous EmuNAND to your new SysNAND CFW, now is the time to [follow Move EmuNAND](move-emunand) instead of doing the first four steps in this section.
1. Boot your device while holding (Start) to enter Hourglass9
3. Go to "SysNAND Backup/Restore", then select the "Health&Safety Dump" option to dump Health & Safety to `hs.app` **(you can use Up and Down / Left and Right to change the name)**
4. Press (B), then select the "Health&Safety Inject" option
5. Select the FBI injectable `.app` for your region
6. Press (A) and confirm to inject
7. Press (Start) to reboot
8. If you still launch to the stock Health & Safety app and have downgraded with Gateway in the past, [follow this troubleshooting guide](troubleshooting#gw_fbi)
Du kan oppdatere arm9loaderhaxinstallasjonen i fremtiden ved å følge instruksjonene på [oppdatering av A9LH](updating-a9lh) siden.
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To use [NTR CFW](https://github.com/44670/BootNTR/), get `ntr.bin` from the appropriate `.zip` on [this](https://github.com/44670/BootNTR/releases) page and copy it to the root of your SD card, then install `BootNTR.cia` from [this](https://github.com/astronautlevel2/BootNTR/releases/latest) page.
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Keep your `NANDmin.bin` file, it can be restored by Hourglass9 to save you from a brick in the future.
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You can remove your NAND backups from `/files9/` as long as you still have them backed up to a safe location.
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**You can remove any extra files and folders from the root of the SD card that are *not* in the following list:**
