Help with Lenovo Y50-70 - 8.1 clean install

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Forest1

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I'm new to Lenovo, Win 8 and to this forum. I'm considering buying Lenovo Y50-70 Notebook model 59441814 - Intel Core i7 4270HQ, 8GB DDR3L, 256GB SSD, NVIDIA GTX 860M 4GB, 15.6" Touchscreen, 4K UHD, USB 3.0, no DVD drive and Windows 8.1 pre-installed. I also have retail MS Win 8.1 Pro "Full Version" 64 bit DVD and key. Would like upon receipt of laptop to: (1) replace 256GB SSD with a Crucial MX200 500GB SATA 6Gb/s 2.5" SSD and (2) do a complete clean install using my retail 8.1. Reasons are: increased capacity and get rid of all the unnecessary stuff that manufacturers pre-install. Since I don't have a DVD drive and I have read there are some issues with boot security, can someone provide recommendation on sequence of steps to follow.
 

My Computer

System One

  • OS
    8.1 64-bit
    Computer type
    Laptop
    System Manufacturer/Model
    Lenovo Y50-70 model 59441814
    CPU
    Intel Core i7 4720HQ
    Memory
    8GB DDR3L
    Graphics Card(s)
    NVIDIA GeForce GTX 860M
    Antivirus
    Norton
Welcome to Eight Forums.

Download Windows 8.1 (core).

Create installation media for Windows 8.1 - Windows Help

How to download and clean install Windows 8.1 if you have an OEM computer with UEFI firmware (BIOS) embedded Windows 8/8.1 product key. -> link

Normally, you do not need to change the UEFI firmware (BIOS) settings, for example, the boot order of drives, enable Legacy BIOS boot mode, or disable Secure Boot. So, do not change the UEFI firmware (BIOS) settings.

- Connect your Windows 8.1 USB flash drive or insert your Windows 8.1 DVD.
- Restart the computer.
- Press the correct key to enter the boot menu (see this link for help). Or, if you have a Lenovo computer, you can also press the NOVO button when the computer is turned off and then select "Boot Menu".
- Select your USB/DVD from the boot menu.

Note: If you have an OEM computer with UEFI firmware (BIOS) embedded Windows 8/8.1 product key, the Windows 8.1 installer should automatically detect product key from UEFI firmware (BIOS). If the Windows 8.1 installer can't detect Windows 8/8.1 product key from UEFI firmware (BIOS), it means that you have the wrong installation media.
Click to expand...

-OR-

Forest1 said:
I also have retail MS Win 8.1 Pro "Full Version" 64 bit DVD and key.
Click to expand...

Download Windows 8.1 Pro.

Create installation media for Windows 8.1 - Windows Help

Quote from this post:

Enter your Windows 8/8.1 product key (see screenshot below).

51999d1390588516-reset-win-8-1-update-1-win-8-upgrade-product-key-iso-enter-product-key-.png
Click to expand...
 

My Computer

System One

  • OS
    Windows 10
    Computer type
    Laptop
    System Manufacturer/Model
    Lenovo G580
    CPU
    Intel Core i5-3230M
    Memory
    8 GB
    Graphics Card(s)
    Intel HD Graphics 4000
    Browser
    Microsoft Edge
    Antivirus
    Windows Defender, standard user account
    Other Info
    UEFI firmware (BIOS) embedded Windows 8 product key.
Thank you.
 

My Computer

System One

  • OS
    8.1 64-bit
    Computer type
    Laptop
    System Manufacturer/Model
    Lenovo Y50-70 model 59441814
    CPU
    Intel Core i7 4720HQ
    Memory
    8GB DDR3L
    Graphics Card(s)
    NVIDIA GeForce GTX 860M
    Antivirus
    Norton
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