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Windows 7: Want to install Windows 7 BIOS over Windows 10 UEFI w/o losing data

04 Jan 2017   #1
vdashv

10
 
 
Want to install Windows 7 BIOS over Windows 10 UEFI w/o losing data

Hello,

I currently have Windows 10 installed on my laptop in UEFI.

I want to install Windows 7 BIOS over it without losing any data (doesnt matter if settings lost, I want s/w installed to stay that way)

Can this be done? Please guide me on the same.

Thanks
vdashv


My System SpecsSystem Spec
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04 Jan 2017   #2
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

Windows 7 Bios ??

What is that ?

Are you saying you want to install Windows 7 ?

Do you have a W7 activation key ?

You should just leave it alone. Once you customize W10 you will never know the difference.

You have to backup your data if you don`t want to loose it. And you will have to reinstall your programs.

It`s really not worth the effort.
My System SpecsSystem Spec
04 Jan 2017   #3
beetle

Windows 10
 
 

Boot into UEFI mode or Legacy BIOS mode when installing Windows 7/8/10 from your USB or DVD.

Want to install Windows 7 BIOS over Windows 10 UEFI w/o losing data-boot-uefi-mode-legacy-bios-mode.png

If you install Windows 7/8/10 using the wrong mode, you won’t be able to use the features of that firmware mode without reformatting the hard drive.


My System SpecsSystem Spec
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04 Jan 2017   #4
vdashv

10
 
 

Quote   Quote: Originally Posted by AddRAM View Post
Windows 7 Bios ??

What is that ?

Are you saying you want to install Windows 7 ?

Do you have a W7 activation key ?

You should just leave it alone. Once you customize W10 you will never know the difference.

You have to backup your data if you don`t want to loose it. And you will have to reinstall your programs.

It`s really not worth the effort.
Windows 7 set to BIOS boot mode.

Yes. I have an OEM CD.

I dont want W10.
My System SpecsSystem Spec
04 Jan 2017   #5
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

So then just follow this tutorial.

Clean Install Windows 7

But you should really use another drive to install 7 on. ( As a safety precaution )

I`ll ask you again, do you have a Windows 7 activation key ?

If you do not have a key then you can`t activate Windows 7 and you will have to reinstall Windows 10.
My System SpecsSystem Spec
04 Jan 2017   #6
ThrashZone

Win-7-Pro64bit 7-H-Prem-64bit
 
 

Hi and welcome to SevenForums,
Simple answer is no
All personal files/ programs would have to be reinstalled there is no downgrading path to save existing data.

As stated it is best to experiment installing win-7 on a totally different hdd or ssd so the current win-10 install is unaffected and you can get it back simply by reinstalling the other hdd or ssd it's installed on.
Turn off Fast start inside win-10 first then replace the hdd it's on,
Fast Startup - Turn On or Off in Windows 10 - Windows 10 Tutorials
My System SpecsSystem Spec
04 Jan 2017   #7
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

Exactly
My System SpecsSystem Spec
04 Jan 2017   #8
Megahertz07

Windows 7 HP 64
 
 

As mentioned, you should try installing win7 on a different disk or make a disk image before you play.
New laptops not always accept win7. You wrote that you have a Win7 OEM. Has it been used on another computer? OEM license can't be moved from one computer to another.
To install Win7 you must disable fast boot and secure boot (OS=other) on BIOS. Set CSM to enable.
My System SpecsSystem Spec
04 Jan 2017   #9
SIW2

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

Quote:
OEM license can't be moved from one computer to another.
If it doesn't activate straight away with the COA key, call MS on the free phone number. Wait patiently till an operator answers.

http://curia.europa.eu/jcms/upload/d...cp120094en.pdf
My System SpecsSystem Spec
04 Jan 2017   #10
DBX

Windows 7 Pro 64 Bit, Windows 8.1 Home Premium 64 Bit
 
 

I would give Microsoft a call to see if they would allow you to downgrade Windows 10 to Windows 7.

Note if you have more than 16GB on your computer with a Home Premium Edition, downgrading to Windows 7 Home Premium wont see more than that. So you may want to think about it first.

A downgrade to Windows 8.1 Home Premium will see up to 32GB I believe.
My System SpecsSystem Spec
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 Want to install Windows 7 BIOS over Windows 10 UEFI w/o losing data




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