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Recovering Data from GPT Partition After Win 7 Installation Attempt: Hirens Tools Usage

Qris1304 5178 12
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  • #1 16860884
    Qris1304
    Level 9  
    Posts: 15
    So briefly:
    I had Win 8, wanted to upload Win 7. Installer went from bootable pendrive, UEFI bios set to "legacy". I deleted the entire C partition with the adjacent parts (system reserved) with the installer. An "unallocated space" was created. When you try to create a new partition (with the installer) from this space, it pops up that it can't be done because the disk has the GPT partition style. I unplugged the disk, connected it to another computer through the bridge (win 8). There - the disk has not been initialized - initialize - it will not work because GPT and too small. (1 TB disk)

    I know, I can format the entire disk to MBR and it won't be a problem, but I want to recover data from the D partition, which is still there (it is visible when installing the system), but I don't have access to it (and the disk).

    So, does anyone have any idea? Maybe in one of the Hirens there is a tool that will come in handy. When loading MiniXP, an error crashes.

    Thanks in advance for your help.
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  • #2 16860922
    mistrzszymon1
    Level 24  
    Posts: 630
    Help: 59
    Rate: 94
    When I had the same problem, I finally found it :) Paragon Partition Manager helped me get everything together :) best regards
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  • #3 16860934
    Dra98
    Moderator of Computers service
    Posts: 9177
    Help: 1316
    Rate: 1066
    Qris1304 wrote:
    I deleted the entire C partition with the adjacent parts with the installer

    It's a bit vague.
    I am asking for a screen from SMART - to rule out corruption, and from the DMDE program, window partitions current partitioning after selecting the disk.
  • #4 16860966
    Qris1304
    Level 9  
    Posts: 15
    I'll drop you off in a minute. I will just add that the AOMEI Partition Assistant program shows the disk capacity: 0.00 kb

    Added after 5 [minutes]:

    DMDE cannot cope - after selecting the disk "incorrect parameters" pop up. Adds a screenshot under the "parameters" button Recovering Data from GPT Partition After Win 7 Installation Attempt: Hirens Tools Usage
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  • #5 16861023
    mati211p
    HDD and data recovery specialist
    Posts: 16915
    Help: 2584
    Rate: 1129
    You do not even read the disc, probably the fault of a poor-quality adapter for a dozen or so zlotys. Still don't know what you wanna do? Convert to MBR without data loss? It's that simple. Or maybe something else?
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  • #6 16861054
    Qris1304
    Level 9  
    Posts: 15
    I would like to be able to create a new partition in place of the deleted one. At the moment it is "unallocated space" so that you can put the system on it later. And it would be good if the data from the second partition were preserved. If all of this is included in "convert to MBR without data loss" then yes - that's what I want to do :)
  • #7 16861062
    mati211p
    HDD and data recovery specialist
    Posts: 16915
    Help: 2584
    Rate: 1129
    So first you have to do for the drive to detect properly. Connect directly via SATA or other adapter through which it will be possible to work with this disk. Then show the DMDE screen from the Partitions window view after selecting this disk from physical devices.
  • #8 16861106
    Qris1304
    Level 9  
    Posts: 15
    I do not have a second adapter, this one has not caused problems so far (I bought it for PLN 120 so I do not know if it is cheap or expensive). I only have one lap where I can connect this disk externally :(
  • #9 16861109
    mati211p
    HDD and data recovery specialist
    Posts: 16915
    Help: 2584
    Rate: 1129
    And yet somewhere it worked as a system one, so you should work on this hardware using the live CD / pendrive system.
  • #10 16861116
    Qris1304
    Level 9  
    Posts: 15
    All in all right :) Unfortunately, the MiniXP from Hirens does not start. I'll see what I can do
  • #11 16861124
    mati211p
    HDD and data recovery specialist
    Posts: 16915
    Help: 2584
    Rate: 1129
    After all, you have Parted Magic and DMDE for Linux, but I don't remember how to run it from a USB flash drive under Linux.
  • #12 16861151
    Qris1304
    Level 9  
    Posts: 15
    OK, I'll figure it out. Maybe it will work :)

    Added after 2 [hours] 32 [minutes]:

    GParted brought this partition back to life, although Win 7 still cannot be installed. I decided to install Win 8 (I think it will go to GPT, huh?), I will download all the data and convert the entire disk to MBR. Such a plan. We'll see what comes out
  • #13 16862943
    mati211p
    HDD and data recovery specialist
    Posts: 16915
    Help: 2584
    Rate: 1129
    Ok, you do as you see fit - your disk and data. If so, I can convert to MBR in a minute without data loss.

Topic summary

✨ The discussion revolves around recovering data from a GPT-partitioned disk after an unsuccessful attempt to install Windows 7 over Windows 8. The user deleted the C partition and created unallocated space, but faced issues with partitioning due to the GPT format. Various tools were suggested, including Paragon Partition Manager, AOMEI Partition Assistant, DMDE, and GParted, with some users recommending checking hardware connections and using live CD systems for better access. Ultimately, GParted was able to restore the partition, although the user decided to install Windows 8 instead and convert the disk to MBR for easier management.
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FAQ

TL;DR: If your 1 TB GPT disk blocks a Win7 install, recover the D: data first, then "convert to MBR without data loss." Prefer SATA over cheap USB bridges; GParted/Paragon/DMDE can help. [Elektroda, mati211p, post #16862943]

Why it matters: This FAQ helps Windows users who deleted C: on a GPT disk and now need to recover data and make the drive bootable again.

Quick Facts

How do I fix “Windows can’t install to this GPT disk” after deleting C:?

Restore partition access first, then convert only after copying data. In the thread, GParted revived access, data was copied under Windows 8, then a plan to convert the whole disk to MBR followed. This preserves D: before any risky changes and resolves Legacy‑mode install blocks. [Elektroda, Qris1304, post #16861151]

What caused tools to show 0.00 KB capacity or “incorrect parameters”?

Bridge hardware. A problematic USB–SATA adapter can prevent proper identification, causing zero capacity readouts and parameter errors. Direct SATA connection or a reliable adapter typically fixes detection so recovery tools can see the drive. As one expert put it: “Connect directly via SATA.” [Elektroda, mati211p, post #16861023]

Can I convert GPT to MBR without losing my D: data?

Yes—if the partitions are intact and you copy critical data first. A seasoned helper states conversion can be done “in a minute without data loss.” Still, treat this as last step after verifying files open from a backup location. [Elektroda, mati211p, post #16862943]

Which tools from Hiren’s or alternatives should I try first?

If MiniXP won’t boot, use Parted Magic from the same toolkit and run DMDE for Linux to inspect partitions. These tools work from a live USB and can list or restore partitions before any conversion. [Elektroda, mati211p, post #16861124]

How do I recover files from D: if C: was deleted?

Boot a live environment, mount the restored partition, and copy data out first. In the thread, GParted made the partition readable again, then data was pulled from Windows 8 before any conversion. Prioritize copying irreplaceable files. [Elektroda, Qris1304, post #16861151]

Quick 3‑step how‑to to get my data back and make the disk bootable?

  1. Connect the drive via SATA or a reliable adapter; boot a live USB.
  2. Use GParted to restore visibility; mount and copy your data elsewhere.
  3. After backup, convert to MBR if you must install Win7 in Legacy mode. [Elektroda, Qris1304, post #16861151]

Why did Windows 7 setup still fail after I saw the partition again?

The partition became accessible, but the installer in Legacy BIOS still refused GPT. Restoring access and installing Windows 8 allowed copying data first, then planning an MBR conversion for Legacy Windows 7. [Elektroda, Qris1304, post #16861151]

Is Paragon Partition Manager useful for this scenario?

Yes. A user solved a similar situation by using Paragon Partition Manager to “get everything together.” It’s a good option when you need friendly partition repair and non‑destructive changes. [Elektroda, mistrzszymon1, post #16860922]

What is DMDE and when should I use it?

DMDE is a partition and data recovery tool that shows current partitioning and helps restore entries. Use it after ensuring proper disk detection, then review the Partitions window to validate structure before any write operations. [Elektroda, Dra98, post #16860934]

How do I check disk health before attempting recovery?

Capture a SMART report to rule out physical faults. If SMART shows issues, image the disk first and work on the image. The thread’s expert asked for a SMART screen before proceeding with repair steps. [Elektroda, Dra98, post #16860934]

What if MiniXP from Hiren’s won’t start on my hardware?

Switch to Parted Magic or a Linux live USB, then run GParted or DMDE for Linux. This bypasses MiniXP compatibility issues and gives you modern tooling for GPT analysis and file copying. [Elektroda, mati211p, post #16861124]

What is GPT versus MBR, in this context?

They are partition table formats. In this case, the disk used GPT, and Windows 7 setup in Legacy BIOS refused to create a new partition on it, blocking installation until another approach was used. [Elektroda, Qris1304, post #16860884]

Should I initialize the disk when Windows prompts me after connecting via USB?

No. Cancel initialization prompts during recovery. In the case described, Windows reported the disk as not initialized over USB, but the right path was to assess it with recovery tools instead. [Elektroda, Qris1304, post #16860884]

Edge case: the drive worked internally but fails over my adapter—what now?

Work on the original hardware using a live USB. The advisor noted the drive had previously worked as a system disk, so live‑boot on that machine to bypass flaky bridges. [Elektroda, mati211p, post #16861109]

After recovery, what’s a safe install path for Windows?

Copy data off first, then either install Windows 8/10 on GPT or convert to MBR for a Legacy Windows 7 install. The poster chose to install Windows 8 to access data, then planned MBR conversion. [Elektroda, Qris1304, post #16861151]

How long can a conversion take, realistically?

Reportedly about one minute when conditions are right and partitions are intact. Always verify backups before you press Convert, because any interruption can corrupt partitions. [Elektroda, mati211p, post #16862943]
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