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Blue Screen Again
Posts: 4
Registered: ‎03-16-2017
Location: EG
Views: 359
Message 1 of 2

Lenovo Y70-70 - Operating System was not found

First, I donot know if here is the best place to ask this question or know so any help will be appreciated

I have lenovo y70-70, I bought it 3 months ago first was tge flash problem and after I updated the bios based on a previous question in the community, it became OK, now during my trial to deal with Windows 10 problem with matlab and after upgraded it to 1067 I took an iso copy of Windows 7 and made a seperate partion but unfortunately during that I activate another partion not having operating system so I reached to operating system was not found, I tried suggestions like default optimal, but again efi network  0, notice that I got bios updated, I dont know what to do now so please help


Mod's Edit: Additional information added to Subject line for clarity of issue.


Support Specialist
Posts: 2,948
Registered: ‎02-22-2017
Location: GB
Views: 230
Message 2 of 2

Re: Lenovo Y70-70 - Operating System was not found

Hello Hendmabdelaziz

Thanks for using the Lenovo forums.


See if you are able to factory reset the device.
Note: Please back up all your data as running this reset will delete any data on your machine

1. Turn the machine off and press the recovery button which is located usually next to the power button. If you have a desktop machine you will need to power the machine back on and keep tapping the F2 key.
2. Use the arrow keys and press enter on system recovery. ( Desktop users can skip this)
3. Select “restore from the initial backup” and then “Next”.
4. Click “start” and accept the warning messages.
Length of time can vary depending on the speed of the machine.

You can also try to reinstall the OS, and make sure that the partitions are correct.


Hope this helps, let us know how you get on.

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