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4 Posts

11-21-2016

IT

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Impossible to Downgrade Lenovo y50 to Windows 7

2016-11-22, 14:55 PM

Hi guy i need some support from all of you

 

I have to Downgrade a Lenovo y50 form Windows 8.1 to Windows 7.  I tried to install Windows 7 with an External DVD and a with USB Stick but when start the Graphic GUI with written "Starting Windows", the system freeze..in both case

 

I tried only in UEFI Mode.....

 

Do you know if there is some work around?

 

 

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3496 Posts

04-02-2014

MX

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Re: Impossible to Downgrade Lenovo y50 to Windows 7

2016-11-22, 15:41 PM

You need to set the Boot mode to Legacy.

Set Priority to Legacy first.

Switch off SecureBoot.

 

In order to install windows 7, you may have to format the HDD. I would HIGHLY recommend that you create a backup USB using the current Lenovo One Key recovery, otherwise you will lose it forever.

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4 Posts

11-21-2016

IT

13 Signins

197 Page Views

  • Posts: 4
  • Registered: ‎11-21-2016
  • Location: IT
  • Views: 197
  • Message 3 of 3

Re: Impossible to Downgrade Lenovo y50 to Windows 7

2016-11-22, 16:18 PM

Tanks for your reply....

 

We have other two Y50 and they are configured in UEFI MODE, and they works in dual boot with windows 7 and Linux Ubuntu, but i don't know how they were installed. 

 

The Only doubt that probably before install Windows 7 they delete all the partition, deleting all windows 8 files....but i don't know...

 

I have to check it...

 

We have corporate Lincese with windows 7 and probably when we'll update the system we'll update to windows 10 so probably losing windows 8 it will not be a problem.....but i will do the backup!!

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