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Recently, I received three laptops from my family members for installing Windows.

In one laptop, Windows 10 is installed with one volume i.e. C: and with data (like files, images, video, etc). And C: is GPT partition style.

In second laptop, there is one volume i.e. C: with data (like files, images, video, etc). C: is GPT partition style. And the error message on screen is “Operating System not found”. And

In third laptop, there are three volumes (C:, D: and E:) with GPT partition style. Data (like files, images, video, etc) are in both volumes (D: and E:). And the error message on screen is “Operating System not found”.

I have to install Windows 7 in all three laptops without losing data.

I have two bootable USB sticks created by Rufus. One is with MBR Partition scheme for BIOS or UEFI. And another is GPT partition scheme for UEFI. I am not able install Windows with any sticks.

I have gone through some web links but not useful.

Irrespective of manufacturer and modal number, how to install Windows in all three laptops?

Regards

InTech

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  • "I have to install Windows 7 in all three laptops without losing data." - Mount the HDD to a fourth computer, backup your data, because there is no way to downgrade to Windows 7 without risking your data on the system partition. 'how to install Windows in all three laptops?" - Download ISO, burn bootable media, install Windows.
    – Ramhound
    Commented Feb 21, 2017 at 19:42

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There's no way to directly downgrade from Windows 10 (assuming even computer 2 and computer 3 are) to Windows 7.

Backup your data the old way, then make sure laptops are in EFI mode (because without hacks you need that to boot from GPT) and format disk before installation.

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  • Windows 10 fully supports Legacy Mode/CPM/Compatability Mode it just requires you to use MBR instead of GPT.
    – Ramhound
    Commented Feb 21, 2017 at 20:46
  • ?? OP is asking for some way to install W7 over his W10 partition. For some reason, he thinks the problem with installation procedure is with partition table scheme instead of the w10->w7 passage
    – mirh
    Commented Feb 21, 2017 at 20:53

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