Windows Server 2003 - error loading operating system

[lalapnt]

hello

please can someone assist, Windows Small Business Server 2003 2003 downloaded and installed updates but after restarting it is showing

attempting to Boot from CD-ROM

attempting to Boot from Floppy Drive (A:)

attempting to Boot from hard Drive (C:)

Error loading operating system

Please, what steps can i follow not to lose all the settings, programs and data

I am sorry if this is not the right place but need help desperately.

[beats]

Boot from the Windows SBS 2003 media and choose the repair option.

And here's a nice guide.