Operating system not found

[Aimhigh1]

Hey guys
i tried to boot my acer laptop but when i press f12 it says "OPERATING SYSTEM NOT FOUND" and it wont start up but when i restart the laptop and went to bios to change UEFI to legacy bios the laptop starts normally like there is no problem.
Any idea?

 

[Lutfij]

Can you please pass on the SKU for your Acer laptop? You may want to back up your critical content from the OS drive and reinstall your OS, it seems there might be an apparent corruption in the OS. Prior to that make sure your BIOS and the time clock is in order, often a dieing CMOS battery can result in issues with the system.

 

[SgtScream]

Do you see your hard drive listed under sata devices, in the bios?

 

[Aimhigh1]

Can you please pass on the SKU for your Acer laptop? You may want to back up your critical content from the OS drive and reinstall your OS, it seems there might be an apparent corruption in the OS. Prior to that make sure your BIOS and the time clock is in order, often a dieing CMOS battery can result in issues with the system.

i hate to say this but where do i find it?

 

[Lutfij]

Bottom of your laptop on a ticker located the middle/around the battery.

 

[Aimhigh1]

Can you please pass on the SKU for your Acer laptop? You may want to back up your critical content from the OS drive and reinstall your OS, it seems there might be an apparent corruption in the OS. Prior to that make sure your BIOS and the time clock is in order, often a dieing CMOS battery can result in issues with the system.

I already found the solution to my problem, all I do is I went to bios and I found out that f12 was disabled and enable it back to see if it work then i try to boot again and it works 100%