F5F Stay Refreshed Software Operating Systems Here is a question about an HDD that works fine with Windows but doesn't show up in the firmware settings.

Here is a question about an HDD that works fine with Windows but doesn't show up in the firmware settings.

Here is a question about an HDD that works fine with Windows but doesn't show up in the firmware settings.

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Luch505
Junior Member
22
08-15-2026, 05:00 PM
#1
Hello, my mom recently got a new computer. It was pre-loaded with an SSD with Windows 11. I installed the HDD from her previous PC and was able to move files to the new drive so she had her bookmarks and pictures. However, after a few days, she determined she didn't like Windows 11 so I thought, no problem, I'll just boot windows 10 from the old HDD. Well apparently the UEFI doesn't detect the old HDD. I don't understand this. When I check in Windows, I can see the old HDD in addition to the SSD Windows is running on, the old HDD clearly has all its files. I tried uninstalling the old HDD. https://imgur.com/qxjpOh7 View: https://i.imgur.com/qxjpOh7.jpeg I suspect the only solution is to unplug the SSD in the new computer...the problem with that is I don't physically see the new SSD. I was convinced at first that it didn't even come with one. I think it must be behind the motherboard, at any rate, it'll be a hassle to get to in this stupid little compact case. I wish she had just let me upgrade her old PC, honestly. https://imgur.com/p7GR6oN View: https://i.imgur.com/p7GR6oN.jpeg Pictures show the HDD is accessible in Windows 11 but not in the UEFI Firmware. How can I boot from the HDD if it doesn't show in the UEFI? Thanks, Shannon
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Luch505
08-15-2026, 05:00 PM #1

Hello, my mom recently got a new computer. It was pre-loaded with an SSD with Windows 11. I installed the HDD from her previous PC and was able to move files to the new drive so she had her bookmarks and pictures. However, after a few days, she determined she didn't like Windows 11 so I thought, no problem, I'll just boot windows 10 from the old HDD. Well apparently the UEFI doesn't detect the old HDD. I don't understand this. When I check in Windows, I can see the old HDD in addition to the SSD Windows is running on, the old HDD clearly has all its files. I tried uninstalling the old HDD. https://imgur.com/qxjpOh7 View: https://i.imgur.com/qxjpOh7.jpeg I suspect the only solution is to unplug the SSD in the new computer...the problem with that is I don't physically see the new SSD. I was convinced at first that it didn't even come with one. I think it must be behind the motherboard, at any rate, it'll be a hassle to get to in this stupid little compact case. I wish she had just let me upgrade her old PC, honestly. https://imgur.com/p7GR6oN View: https://i.imgur.com/p7GR6oN.jpeg Pictures show the HDD is accessible in Windows 11 but not in the UEFI Firmware. How can I boot from the HDD if it doesn't show in the UEFI? Thanks, Shannon

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Nonaks
Junior Member
23
08-15-2026, 09:51 PM
#2
Well, usually this doesn't go well. If your old drive is a Legacy model, it won't work at all. Even if you put it in the boot menu, it probably won't run right and the license check will also fail.
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Nonaks
08-15-2026, 09:51 PM #2

Well, usually this doesn't go well. If your old drive is a Legacy model, it won't work at all. Even if you put it in the boot menu, it probably won't run right and the license check will also fail.

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chaseman2012
Junior Member
18
08-16-2026, 04:03 AM
#3
The feature for Legacy Support is turned off in that first screen. It looks like the computer is using an old-style disk drive setup. You need to turn on Legacy Support so it can start from the hard drive. Even after doing that, you aren't sure if it will work.
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chaseman2012
08-16-2026, 04:03 AM #3

The feature for Legacy Support is turned off in that first screen. It looks like the computer is using an old-style disk drive setup. You need to turn on Legacy Support so it can start from the hard drive. Even after doing that, you aren't sure if it will work.

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Raidex20
Posting Freak
751
08-18-2026, 04:28 AM
#4
It works fine- but how do I make sure it boots from the hard drive each time I turn on my PC? I put the HDD above the SSD in Legacy boot order. To start just using that drive, I had to go into Settings > System > Recovery Advanced Start Up, restart my computer, pick "use a device," and then choose the HDD.
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Raidex20
08-18-2026, 04:28 AM #4

It works fine- but how do I make sure it boots from the hard drive each time I turn on my PC? I put the HDD above the SSD in Legacy boot order. To start just using that drive, I had to go into Settings > System > Recovery Advanced Start Up, restart my computer, pick "use a device," and then choose the HDD.