Manjaro dual boot installation

First of all I am a BEGINNER. I ran into a problem (error: you need to load kernel first) and it seems there is no solution, so I will reinstall manjaro.
I have a dual boot (windows 10 + manjaro) setup is there is any way to reinstall manjaro without losing data.
If there is such a solution would you please guide step by step because as I mentioned earlier I am a BEGINNER.

“excuse me for my bad English. I’m not a native speaker”

Even beginners can search before asking.

Search for reinstall without loosing data or repair grub or repair system chroot

See the wiki at or the forum archive at

Closed as duplicate and lack of own research.