"Outdated OS" on Windows 10

When booting up my computer, I am presented with the error:

Outdated OS.

After restarting my computer and trying to manually f12 and prompt the computer to update, i cannot find such an option.

Can somebody help me?

please upload screenshot of this error.

If you are running a version of Windows 10 version 1507, version 1511, version 1607, version 1703, version 1709, or version 1803, you can expect to receive a notification stating that your device must have the latest security updates Installed and then offer your device update.

Source: Some versions of Windows 10 display a notification to install the latest version - Microsoft Support

Please consider a clean install of OS.
Problem may be due to corrupt OS.
Thank You.