Select the first option. It should then ask if you wish to try to recover a current installation. Don't choose the recovery "console", that's for lots of manual operations that you don't want to bother with. The recovery will reinstall all the system files and leave anything else on the computer intact.
Haven't had to do this myself in a long time, so I can't remember the exact order or options for the menus you go through.
Phaelax
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