When you boot the computer and it gives you the following error message No Operating System Found what has happened?

The "No Operating System Found" error typically indicates that the computer cannot locate a bootable operating system on the hard drive or solid-state drive. This can occur due to various reasons, such as a corrupted operating system, a failed hard drive, incorrect BiOS/UEFI settings, or a disconnected or damaged drive. To resolve the issue, you may need to check the drive connections, adjust the boot order in BiOS/UEFI, or reinstall the operating system.