Upgrading dual-boot Windows 7 to Windows 10


  1. Posts : 3,529
    Windows 10 Pro 64-bit 21H1 (May 2021 build 19043.1083)
       #1

    Upgrading dual-boot Windows 7 to Windows 10


    Hello!

    A friend of mine has two disks a mechanical one and an SSD, both running Windows 7 and he chooses at startup which one he needs. Because the original mechanical disk was full we could not clone it on the SSD, so we kept the old installation in order to run certain applications he cannot find to reinstall and we clean installed Windows 7 on the SSD. Now he decided to upgrade one of them, probably the new on the SSD, to Windows 10. The question is, how the other installation will be affected? Will he be able to dual boot between Windows 10 on one disk and Windows 7 on the other? If this is lost I hope I can use bdcedit or EasyBCD to restore the Windows 7 boot entry. I am an experience user and I will probably be able to fix it, but I post here just in case anyone else has done it to tell me what to expect.

    Thanks

    PS: While at work I use a Windows 7 computer and I can browse all sites with latest supported Chrome, Firefox and Microsoft Edge versions, in my friend's computer there is a warning at ALL sites that the certificate is not valid or the date is wrong and he cannot use any browser except Pale Moon. Normally this issue fixes if you upgrade the browser, but they are all in the last version supported by Windows 7. Any ideas?
      My Computer


  2. Posts : 18,443
    Windows 11 Pro
       #2

    Check the system time and date on his computer.
      My Computer


  3. Posts : 3,529
    Windows 10 Pro 64-bit 21H1 (May 2021 build 19043.1083)
    Thread Starter
       #3

    They were correct. I even synchronized online, just to make sure. Nothing changed. I believe the computer is missing some important security updates, but if we are going to upgrade to Windows 10 there is no point installing them.
      My Computer


  4. Posts : 43,284
    Win 10 Pro (22H2) (2nd PC is 22H2)
       #4

    Regarding the certificate error, have a look at:
    windows 7 - Continually getting https certificate errors on all browsers - Super User

    - very similar scenario fixed.
      My Computers


  5. Posts : 6,524
    Windows 11 Pro - Windows 7 HP - Lubuntu
       #5

    Are the two drives (HDD and SDD) completely independent (can it boot one drive with the other disconnected)?

    If yes, make sure that only the drive to be updated to win 10 is attached during the update or you may end with the boot manager on one drive and the OS on the other.
      My Computers


  6. Posts : 4,666
    several
       #6

    Because the original mechanical disk was full we could not clone it on the SSD
    I would have used wincopy.

    Now he decided to upgrade one of them, probably the new on the SSD, to Windows 10.
    I suggest using the apply method and bcdboot. I have done it countless times.

    Will he be able to dual boot between Windows 10 on one disk and Windows 7 on the other?
    yes
      My Computer


  7. Posts : 118
    Windows 10 Pro
       #7

    spapakons said:
    I believe the computer is missing some important security updates, but if we are going to upgrade to Windows 10 there is no point installing them.
    The computer is missing KB4474419.

    But you'll be unable to even run the Media Creation Tool without KB3140245 and EasyFix 51044.

    https://support.microsoft.com/help/4474419

    https://support.microsoft.com/help/3140245
      My Computer


  8. Posts : 3,529
    Windows 10 Pro 64-bit 21H1 (May 2021 build 19043.1083)
    Thread Starter
       #8

    Volume Z said:
    The computer is missing KB4474419.

    But you'll be unable to even run the Media Creation Tool without KB3140245 and EasyFix 51044.

    https://support.microsoft.com/help/4474419

    https://support.microsoft.com/help/3140245
    I am going to upgrade from the ISO.
      My Computer


 

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