cannot boot usb flash iso


  1. Posts : 34
    Windows 7 home
       #1

    cannot boot usb flash iso


    Last week the power supply on my monitor died; when i plugged in the replacement and booted up, the startup failed with pfn list corrupted message - one I have seen before and fixed with TEN FORUMS help tracing it to driver problems. The previous time we updated all drivers and disabled an obsolete tv card. I suspect somehow these fixes have gone wrong again but first I want to upload my data for you guys to have a look.

    I manually configured a bootable usb flash with latest iso (per the tutorial); splitting the install.wfm {?} file to be fat32 compatible. The flash drive wouldn't boot after setting it up UEFI in bios, so it started the purple install program. The PC can read the drive (looking at files in command prompt from the troubleshoot menu).

    SO, I can't run the log collector v2 from the command prompt and I cant boot the ISO USB to start repair upgrade. I did not state my windows version because I cant read it, but it was the latest update to w10 home. HELP!
      My Computer


  2. Posts : 7,456
    Windows 10 Home 20H2
       #2

    bam12b said:
    The flash drive wouldn't boot after setting it up UEFI in bios, so it started the purple install program. The PC can read the drive (looking at files in command prompt from the troubleshoot menu).
    How could it start the installation when the PC did not boot from the flash drive? Can you take photos of it and post them here?
      My Computer


  3. Posts : 39,971
    windows 10 professional version 1607 build 14393.969 64 bit
       #3
      My Computer


  4. Posts : 34
    Windows 7 home
    Thread Starter
       #4

    Thank you, Matthew and Zbook. What I really need is a way to collect logs from command prompt or reset msconfig to safe boot from there. So the issue of PFN LIST CORRUPT can be examined. My bootable usb iso does not start Windows.
      My Computer


  5. Posts : 39,971
    windows 10 professional version 1607 build 14393.969 64 bit
       #5

    Consider resetting the BIOS:

    How to Clear Your Computers CMOS to Reset BIOS Settings:
    How to Clear Your Computerís CMOS to Reset BIOS Settings
    3 Ways to Reset Your BIOS - wikiHow:
    3 Ways to Reset Your BIOS - wikiHow
    3 Easy Ways to Clear CMOS (Reset BIOS)
    [url=https://www.lifewire.com/how-to-clear-cmos-2]Page Not Found[/url




    And an alternative operating system:

    https://tutorials.ubuntu.com/tutoria...k-on-windows#0
    https://www.pcworld.com/article/2147...-distress.html
      My Computer


  6. Posts : 34
    Windows 7 home
    Thread Starter
       #6

    Zbook, cleared cmos did not helP. got ubuntu up, how do you access it so or run msconfig from ubuntu? I can see Windows files in ubuntu, can't run anything from them (like starting edge seems just to create a new browser install ation)
      My Computer


  7. Posts : 39,971
    windows 10 professional version 1607 build 14393.969 64 bit
       #7

    The Ubuntu provides a GUI option to backup data.

    Chkdsk is part of Windows.
    Someone that regularly uses Ubuntu may know about additional options.
      My Computer


  8. Posts : 34
    Windows 7 home
    Thread Starter
       #8

    Ok, thanks
      My Computer


  9. Posts : 11,387
    Windows 10 Home x64 Version 21H2 Build 19044.1706
       #9

    bam12b said:
    The flash drive wouldn't boot after setting it up UEFI in bios
    ...
    The PC can read the drive (looking at files in command prompt from the troubleshoot menu).
    Like the other poster[s], I do not understand what is happening when you try to boot from the USB.
    Your statements are contradictory.
    It must be booting from the USB for you to see the menu from which you chose the Command prompt. I suggest you post a screenshot / screen photo so we can see what you see.

    bam12b said:
    … so it started the purple install program.
    I don't know what you mean by this comment.

    Denis
      My Computer


  10. Posts : 34
    Windows 7 home
    Thread Starter
       #10

    Sorry about my being so confusing. I have changed things so much trying to track it down I can't state clearly which bootup was from dvd iso, usb iso, usb ubuntu or the main disk. I have decided to close this post and do some more looking. the bsod has seemed to go way for now. i will try checking drivers with verifier and if troubles return will start a new post with logs collected. Thank you all for help,
      My Computer


 

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