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[GUIDE] More Setup informations (BIOS/UEFI/MBR/GPT) and how-to


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As I ran through a hell amount of different problems setting it up my machine for the loader, I thought I should take some time and bring my 2 cents to the community. I didn't find enough explanations or informations, and my machine is not the top-of-the-top one, so I had to struggle with finding solutions for quite some time, and spent 4 days between my subscription and being actually able to run the launcher.

I don't want you to experience the same difficulties, that's why I write this and encourage you to take the time to read it carefully. Read it till the end before beginning, as I advise at some points to do checks, saves etc.

First of all, I subscribed the D2 Pro, and I have seen the pre-requisite of Intel processor somewhere on the pre-sale forum.

So, this is mainly my setup :

  • i7 7700K (on a Z270 mobo)
  • 64GB RAM
  • GTX 1080Ti
  • 7 disks from 110GB to 6TB, with mixed HDD, SSD and NVMe.
  • Windows 10 v.1909

I was curious of what would be necessary to do after my subscription.

Well, it didn't seem that crazy, let's say it's the usual stuff.
There are a couple of things you need to turn off in Windows, and configure in your BIOS, though nothing baffling.

Krypto made a very good step-by-step tutorial here for this. Easy to follow.

BUT, if anything goes wild, or before it goes wild, perhaps this guide will help you. I will try to be as exhaustive as I can, but keep in mind that you will probably encounter less problems, as I had the worsts cases possible in this process.

So, let's begin.


1. BEFORE ANYTHING : save your datas !!
I will never say it enough. Before doing anything, pick a external drive, a USB key or whatever, and save your datas on it.
Or even better, perform a full Windows save : https://www.windowscentral.com/how-make-full-backup-windows-10

When it's finished, you can tell yourself that, even if the windows disk dies now, you'll be able to retrieve it like it was.



The easy way to do that : press the Windows key + R to open the Windows "Run" dialog box, type msinfo32.exe, and then press Enter. This will open a System Infomation window.

 In the right pane of System Summary, find the line with "BIOS Mode". If the value of BIOS Mode is "Legacy", then you'll have to change it in Bios (with Krypto's guide), otherwise, if it's "UEFI", then Windows is booted in UEFI BIOS mode and you're good.



-------------------- VERSUS --------------------





So, to check your disks partitions, you will just have to use the Windows tool called Disk Management. 2 ways to access it :

  • Either right-click the Start menu / press Windows Key+X, then select “Disk Management".
  • Or press Windows Key + R to open the "Run" dialog box, type “diskmgmt.msc” into the box, and press Enter.

Select the disk you want to check (check all of them if you have multiple ones). Right-click on it and select Properties as shown hereunder.


Go to "Volumes" tab. On the line "Partition style", you'll see either “Master Boot Record (MBR)” or “GUID Partition Table (GPT),” depending on which the disk is using.



-------------------- VERSUS --------------------




So, at this point, you should know exactly the type of your BIOS (Legacy or UEFI) and if your disks are MBR or GPT (and which ones are what if you have multiple ones)



Read carefully the following :

As you need to use GPT partition, you MUST have your BIOS is UEFI mode.

That means, if you still have a disk formatted with MBR, this one will be recognized once you switched your BIOS to UEFI, so you have to convert it before. All of them.

Most of the time, it goes smooth. But it can go wrong, so keep in mind that, if you need to convert one of your disks, you should save the datas on it before. On 7 disks, I had to convert 4 of them from MBR to GPT, and only 1 gave me some hard times (but I know why) and it was of course my windows one.

Let me explain so that you don't do the same stupid thing: DO NOT convert to GPT your Windows disk (with EaseUS or anything else) while in Windows. Yes, I know it sounds stupid, but I didn't think about it until I actually did it. And realized it was too late.
If you need to convert your System disk (the one with Windows) from MBR to GPT, then put EaseUS on a bootable USB key (there is a release from EaseUS especially for that) and boot on that USB key (when your computer starts, you access usually the boot devices menu by pressing F8 or F11). You'll be able to convert it from there.


 So, now there are different possibilities

  • if your BIOS is "Legacy and UEFI" (sometimes, it's "Auto" in your BIOS options) this means it's possible you have MBR and GPT disks. You'll have to convert all of them to GPT and switch then your BIOS to UEFI
  • If your BIOS is already full UEFI, your disks should already be GPT.
  • If your BIOS is Legacy, your disks are probably still MBR and you need to convert your disk(s) to GPT


#1 - Convert your disks to GPT

If you don't want to use EaseUS, or/and if it's a new disk, or if you're reinstalling your Windows, you can use Diskpart, another Windows tool, to convert it to GPT.

So, to do that, if you are already in Windows, run a command-line terminal (press Windows Key + R to open the "Run" dialog box, type “cmd” into the box, and press Enter). If you're reinstalling Windows, press Shift + F10, it will launch the cmd box aswell.

In the terminal, enter following commands (in white) :


> diskpart

Press Enter, then type


DISKPART> list disk

Press Enter. This will show the list of all disks you have, with size and if GPT.

Select the disk you want to convert by typing


DISKPART> sel disk #

where #  is the disk number in the disk list you want to set to GPT. "sel" stands for "select"

Then we clean it



Last step, we convert it to GPT



Finally, type exit to get out of diskpart and again to get out of the command-line box.

Your disk is now in GPT-partition style.

Please, also read carefully this thread about MBR to GPT Conversion Troubleshooting which explains and solves some cases you could also encounter if something goes wrong in the conversion process.


#2 - Go to your BIOS and set it to UEFI

For this, there is a video tutorial in Krypto's guide, so, please refer to it.

While you're there check also your Secure boot settings and CPU setting for Intel Virtualization. Well, again, Krypto's guide.



Well, this is it, I think it gathers most informations I lacked when I subscribed, so I hope you won't get in the troubles I had.

One question I had, and didn't find any answer was : "Should I run the game first, then the loader ? Or the loader first, then launch the game ?"

The answer is simple : "run the loader first, then the game"

One last thing, I chose to have the loader on the same disk than my Windows. But I think (unless Staff say otherwise) you can have it on another disk. Just don't put it on a USB disk/key, it will not work.

I usually tend also to run the launcher with admin rights, just to be sure.

Have fun guys.

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