Solved Re-enabling Secure Boot after returning to Windows 8.1

[opayq]

Hi there!

A couple of weeks ago, I made the decision to dual-boot Fedora Linux on my Lenovo notebook, which required me to disable the Secure Boot feature in UEFI settings. After a few hours I returned to Windows only, which I did by removing Linux partitions and deleting a few Linux-related boot entries.
Yesterday, I noticed that Secure Boot is disabled, so I wanted to re-enable it, and I did this by changing an option in BIOS. And even though everything seemed to be fine in UEFI (Secure Boot enabled, UEFI only mode, OS Optimized Defaults for >Win8 enabled - pure UEFI mode), the status of the function in BIOS and msinfo32 was Off. So I thought that restoring the factory image would do the job - it did not. After trying out various options, including resetting BIOS to factory defaults, resetting the manufacturer's settings for Secure Boot and contacting Lenovo customer service, I still couldn't get it to this 'On' status.

Would you have any clue how can I re-enable Secure Boot?

What the BIOS tells me right now concerning Secure Boot is:

• Secure Boot - Enabled

A few greyed out statuses:

• Secure Boot Status - Disabled
• Platform Mode - User Mode
• Secure Boot Mode - Standard

I also can enter such menus:

• Reset to Setup Mode (Clear PK, disable secure boot and enter Setup Mode) - it changes the above statuses to Disabled, Setup Mode and Custom, respectively
• Restore Factory Keys (Restore all secure boot database to factory default include PK, KEK, db and dbx)

I know SBoot is not that important, but considering how much time I spent resolving this issue myself, I really feel like I need to fix it at once

Cheers!

 

[Osprey]

I also can enter such menus:

• Reset to Setup Mode (Clear PK, disable secure boot and enter Setup Mode) - it changes the above statuses to Disabled, Setup Mode and Custom, respectively
• Restore Factory Keys (Restore all secure boot database to factory default include PK, KEK, db and dbx)

"Secure Boot" - >Enabled<
"Secure Boot Status" - >Disabled< (default is >Enabled<)

1. http://www.eightforums.com/tutorials/20256-uefi-firmware-settings-boot-inside-windows-8-a.html

2. Go to "security" and then "reset to setup mode"
3. Then go to "exit" and then "exit saving changes"

4. http://www.eightforums.com/tutorials/20256-uefi-firmware-settings-boot-inside-windows-8-a.html

5. Go again to "security" and this time select "restore factory keys"
6. Then go to "exit" and then "exit saving changes"

 

[opayq]

Osprey, you don't know how thankful I am to you! This worked like a charm! Thank you SO MUCH for your help!!