Windows 7 and Windows 10 Dual-Boot no longer able to start Windows 7

Leaflove

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Hi,

I'm running a dual-boot setup with Windows 10 and Windows 7 on an HP 14-al061nr laptop, and I use Windows 7 99% of the time. When I shut my computer down recently, I briefly saw a BSOD pop up, but then the computer shut down completely. When I tried starting it up again, I got a black screen informing me that "Windows failed to start", giving me the option to Launch Startup Repair or Start Windows Normally. If I choose the former, I get another black screen informing me that windows failed to start, including these lines at the bottom:
Status: 0xc0000225
Info: A required device isn't connected or can't be accessed.

If I try starting Windows 7 normally (even in Safe Mode), I briefly see the same BSOD before the computer attempts restarting again, informing me that "A problem has been detected and Windows has been shut down to prevent damage to your computer", advising me to run "chkdsk /f" and ending with the code "STOP: 0x0000007b (oxFFFFF880009A97E8, 0xFFFFFFFFC0000034, 0x000000000000,0x000000000000)".

I've made a Windows 7 recovery USB and sought out various solutions online, including:
-Running "Repair your computer" from the USB (most of the time this results in a window informing me that "Startup Repair cannot repair this computer automatically" -- even the one time when I was informed that "Startup Repair could not detect a problem", I got the same BSOD when I restarted and attempted starting Windows 7).

-Running "bootrec /fixboot", "bootrec /scanos", "bootrec /fixmbr", and "bootrec /rebuildbcd" from the command prompt.

-running "chkdsk /r" from the command prompt (I tried running "chkdsk /f" as well, which resulted in the line "The type of the file system is NTFS. Cannot lock current drive").

-Running sfc /scannow from the command prompt.

-Resetting the BIOS to its default settings.

-Selecting "Last Known Good Configuration" from the Windows 7 boot options (this results in the same BSOD, then the computer restarts).

This problem is especially difficult since the symptoms seem to keep changing. The BSOD message remains consistent, but the messages I get when I go into the advanced boot options for Windows 7 and select "Repair my computer" seem to keep changing almost every time I restart.

At one point the text started with the "Windows failed to start" message I mentioned earlier, but after a few restarts and repair attempts, I was instead informed that there was a problem with winload.efi (including the phrase "The digital signature cannot be verified"), but now the message has reverted back to the way it was originally.

I'm not really sure where to go from here, and hope there's somebody here who might be able to point me in the right direction.

Thanks in advance!

Note: Despite all the issues mentioned above, I'm still able to run Windows 10 and access all my files -- I'd just really like to get Windows 7 running again.
 

My Computer My Computer

At a glance

Microsoft Windows 7 Home Premium 64-bit 7601 ...Intel(R) Core(TM) i3-6100U CPU @ 2.30GHztype unknownIntel(R) HD Graphics 520
Computer type
Laptop
Computer Manufacturer/Model Number
HP 14-al061nr
OS
Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i3-6100U CPU @ 2.30GHz
Motherboard
HP 8209
Memory
type unknown
Graphics Card(s)
Intel(R) HD Graphics 520
Sound Card
(1) Realtek High Definition Audio (2) Intel(R) Display Aud
Screen Resolution
1366x768
Hard Drives
WDC WD10JPVX-60JC3T0 ATA Device
Antivirus
Avast
Browser
Firefox 64.0.2
I've made a Windows 7 recovery USB and sought out various solutions online, including:
-Running "Repair your computer" from the USB (most of the time this results in a window informing me that "Startup Repair cannot repair this
computer automatically" -- even the one time when I was informed that "Startup Repair could not detect a problem", I got the same BSOD when I restarted and attempted starting Windows 7).

-running "chkdsk /r" from the command prompt (I tried running "chkdsk /f" as well, which resulted in the line "The type of the file system is NTFS. Cannot lock current drive").

chkdsk /r /x driveletter:
 

My Computers My Computers

  • At a glance

    7 X64i5 84002x8gb 3200mhz
    Computer type
    PC/Desktop
    OS
    7 X64
    CPU
    i5 8400
    Motherboard
    gigabyte b365m ds3h
    Memory
    2x8gb 3200mhz
    Hard Drives
    various
    PSU
    pure power 11 400w cm
    Case
    Coolermaster
    Cooling
    cryorig m9i
  • At a glance

    7x64g54008gb ddr4 2400
    Computer type
    PC/Desktop
    OS
    7x64
    CPU
    g5400
    Motherboard
    ga b365m ds3h
    Memory
    8gb ddr4 2400
    PSU
    xfx pro 450w
Reseting the bios is a bad move chances are its now all wrong which is why it cant find efi. What is your disk set to ie ufi, gpt,mbr can you see 7 in diskmanager?
 

My Computer My Computer

At a glance

win 8 32 bit
Computer type
PC/Desktop
OS
win 8 32 bit
I've made a Windows 7 recovery USB and sought out various solutions online, including:
-Running "Repair your computer" from the USB (most of the time this results in a window informing me that "Startup Repair cannot repair this

chkdsk /r /x driveletter:
No good, unfortunately. I still get the same BSOD.

Reseting the bios is a bad move chances are its now all wrong which is why it cant find efi. What is your disk set to ie ufi, gpt,mbr can you see 7 in diskmanager?
Yes, I can see the Windows 7 partition in Disk Management, and my disk's partition type is GPT.

- - - Updated - - -

Something that I didn't think of until just now: Windows 7 is installed on drive D. I don't know if any of the scans I've tried have only been scanning C: instead.

- - - Updated - - -

Would rebuilding the BCD by following the steps on this page be worth trying? As I mentioned above, I tried "bootrec /rebuild bcd", but never went any further than that step, and I recall the line "Total identified Windows installations: 0" appearing afterwards.

I apologize for my impatience -- I just want to exhaust as many options as I can before resorting to taking my laptop in for repairs.
 

My Computer My Computer

At a glance

Microsoft Windows 7 Home Premium 64-bit 7601 ...Intel(R) Core(TM) i3-6100U CPU @ 2.30GHztype unknownIntel(R) HD Graphics 520
Computer type
Laptop
Computer Manufacturer/Model Number
HP 14-al061nr
OS
Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i3-6100U CPU @ 2.30GHz
Motherboard
HP 8209
Memory
type unknown
Graphics Card(s)
Intel(R) HD Graphics 520
Sound Card
(1) Realtek High Definition Audio (2) Intel(R) Display Aud
Screen Resolution
1366x768
Hard Drives
WDC WD10JPVX-60JC3T0 ATA Device
Antivirus
Avast
Browser
Firefox 64.0.2

My Computer My Computer

At a glance

Windows 7 Professional SP1 64-bitIntel Core i7-4790 3.60 GHz32 GB DDR3-1600 MHzIntegrated Intel HD Graphics 4600
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dell OptiPlex 9020
OS
Windows 7 Professional SP1 64-bit
CPU
Intel Core i7-4790 3.60 GHz
Memory
32 GB DDR3-1600 MHz
Graphics Card(s)
Integrated Intel HD Graphics 4600
Monitor(s) Displays
Viewsonic 32" LCD
Hard Drives
Kingston SATA 3 240 GB SSD
Internet Speed
Spectrum Internet 1000 Mbps
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