Question old windows is gone

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tirax

tirax

Dec 2, 2023
14
2
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So I have 2 hardsisks lets name them drive1 and drive2
I had windows on drive1 and still have it.
I installed widows on drive2.
now in the bios I see only one boot loader which has the name of drive1 but launch drive2.
I mean there should be both of them there as well.
any idea why it happens and how to fix that?
 
tirax said:
So I have 2 hardsisks lets name them drive1 and drive2
I had windows on drive1 and still have it.
I installed widows on drive2.
now in the bios I see only one boot loader which has the name of drive1 but launch drive2.
I mean there should be both of them there as well.
any idea why it happens and how to fix that?
Click to expand...
With the wealth of information you've given us....¯\_(ツ)_/¯
 
Hi thanks for the reply.
The OS is windows 10 64bit on both of them.
When I installed them both drives were connected already, they both had windows 10 64 bit on each drive and it worked just fine when I wanted to switch I used to go to the bios and swap the first disk on boot.
I wanted to fresh install drive2 so I formated him and installed the windows, the fresh install is working Its just the old windows bootloader got some how overwritten by the drive2

In my bios the boots are:
disk1
disk2
bootloader disk1 (Its launching disk2 Oo)
 
tirax said:
ibb.co

Untitled hosted at ImgBB

Image Untitled hosted in ImgBB
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Disk1 is the current windows (Disk2 in the explanation)
Disk0 is the windows that isnt showing(Disk1 in the explanation)
Click to expand...
Disk 0 is where your boot partition lives.
This happened because you had both drives physically connected, both times.

What do you want the end state to be?
One single Windows install?
How long ago did you do this second install?

Are you amenable to just starting over? (this time, properly)
 
I want to have 2 seperate windows, I want to have the current windows and the old one as well so I can swap them in bios like I used to do before I formated.

Starting over is what I am trying to prevent, the old drive has a server configuration which was tricky to set up thats why I am trying to recover it and not fresh start the drive. Is there a way to recover it?

It was around 2 months ago~
 
Sadly I had no idea I have to disconnect the other drive, that issue never appeared.
Both of them are windows 10 64bit.
When I boot up it just start the new OS like the old one doesnt exist, the issue happened as soon as I installed the new OS.
If you mean by the bios setting I see something like that:
old drive name
new drive name
Windows boot loader : old drive name
 
tirax said:
Sadly I had no idea I have to disconnect the other drive, that issue never appeared.
Both of them are windows 10 64bit.
When I boot up it just start the new OS like the old one doesnt exist, the issue happened as soon as I installed the new OS.
If you mean by the bios setting I see something like that:
old drive name
new drive name
Windows boot loader : old drive name
Click to expand...
Having only one drive connected during a Windows install has been best practice for many years.

So what happened is that the boot info for the first OS is on the other drive.
Then, when installing this second OS, that boot info is merged into that same boot partition.
 
I had exactly the same problem as you.
I'm not really adding anything useful here but just letting you know that you're not alone :)

I had a windows 11 on disk 1 and went to install a windows 10 on disk 2. After doing so, I had no more option to select the windows 11.
I disconnected disc 2 to force the pc to use disk 1 and then it wouldn't even get out of bios. Just stuck in bios each time I rebooted. The files for Windows 11 were still there on the drive but no way to boot it.
I tried Startup Repair (from a bootable win11 installation USB) and it also didn't work. It couldn't find any installation to repair.
I ended up formatting the whole win11 disk.
 
USAFRet said:
Having only one drive connected during a Windows install has been best practice for many years.

So what happened is that the boot info for the first OS is on the other drive.
Then, when installing this second OS, that boot info is merged into that same boot partition.
Click to expand...
So there is no solution to this issue other than formating the old drive?
As he said above even If I disconnect the new drive the old drive still doesnt show on bios
 
Add bootloader entry to windows on drive D:
Execute from elevated command prompt
bcdboot d:\windows​

On each boot you'll be able to choose, which windows to load.

windows-11-boot-manager-timer-hero.webp
 
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SkyNetRising said:
Add bootloader entry to windows on drive D:
Execute from elevated command prompt
bcdboot d:\windows​

On each boot you'll be able to choose, which windows to load.

windows-11-boot-manager-timer-hero.webp
Click to expand...
That fixed the problem thank you so much!
Thank you both for the help!
 
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