I already have fortnite in my laptop but when i reinstall epic launcher it said i have to install fortnite again and i cannot scan for it so what should i do?
you should go to the fortnite support page to get help. this answerhub is for questions related to development in the unreal engine. as your question has to do with the launcher and with fortnite, this is not the place for it and you wont find help here.