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‎12-15-2021 08:59 AM

HP Recommended
Product: HP ENVY 15

Hi, HP Community.

i installed Linux And I changed to Secure Boot to Legacy Boot.

i wanted to reinstall Windows 10, the install was successfully but i forgot to change to Secure Boot,

So i decided to change to Secure Boot but as i saved and restarted,

but it sayed: os not found/detected.

So, please help me 😞

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1 ACCEPTED SOLUTION

Accepted Solutions

‎12-15-2021 09:45 AM

HP Recommended

Hi:

 

Since you installed W10 in legacy mode, you can't enable secure boot, because the drive was formatted with the MBR partition table and not GPT, which is required for secure boot to work.

 

What you need to do is to go back, disable secure boot, and reinstall W10 in EFI mode.

 

To do that, just boot your W10 installation media from one of the EFI boot sources (EFI USB or EFI DVD).

 

After you install Windows in EFI mode, you should be able to turn secure boot on and have everything work.

View solution in original post

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1 REPLY 1

‎12-15-2021 09:45 AM

HP Recommended

Hi:

 

Since you installed W10 in legacy mode, you can't enable secure boot, because the drive was formatted with the MBR partition table and not GPT, which is required for secure boot to work.

 

What you need to do is to go back, disable secure boot, and reinstall W10 in EFI mode.

 

To do that, just boot your W10 installation media from one of the EFI boot sources (EFI USB or EFI DVD).

 

After you install Windows in EFI mode, you should be able to turn secure boot on and have everything work.

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