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I did an online upgrade of my Windows 7 laptop to Windows 10. Everything works as it should, but I found I have the bootloaders for both Windows 7 and Windows 10 on the HDD. How do I remove the bootloader for Windows 7? It seems to slow down the computer, but that may be caused by something else.

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    The bootloader entry can be removed from the BCD store via BCDedit and the boot files themselves from the Win7 boot partition, which is likely at C:\Boot (Windows 10 should have three partitions: WinRE, Boot, and OS). If the Win7 and Win10 boot files are both on the Boot partition, they're likely not able to be distinguished from each other; in this case, boot to WinRE, format the Boot partition, then rebuild the boot files via step #5 under How do I configure system partitions on a new drive for applying an image? at the bottom of this answer
    – JW0914
    Commented Feb 5, 2021 at 14:41
  • Wow that is quite complex. Thanks for the answer. I have to think about if I want to do that to a working machine.
    – David DE
    Commented Feb 5, 2021 at 15:41
  • @JW0914 As I look into how to do this I see it requires a windows media. I do not have this as it was an in place over the internet upgrade what do I do?
    – David DE
    Commented Feb 5, 2021 at 17:44
  • All you need to do is boot to WinRE [Windows REcovery] - the commands only take a few min to run. General FYI, it's recommended to do a clean of Windows 10 when you have time, as some OEM drivers from Windows 7 and 8/8.1 are not compatible with Windows 10 and will result in BSODs (there is no way to efficiently uninstall OEM drivers since they're copied into subdirectories of %WinDir% and often renamed oem<#>.inf; capture a WIM of the C: partition prior to doing so - that way you have a backup of your current setup)
    – JW0914
    Commented Feb 5, 2021 at 23:27
  • As already stated I can not do a fresh install ow win 10 I do not have the media it was an in place over the internet upgrade.
    – David DE
    Commented Feb 6, 2021 at 7:35

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