u/Front_Antelope_5962

I think I messed up . I tried to dual boot Linux mint xfce with windows 10 cuz windows 10 was too slow for me and I didn't have a USB drive . So I created a simple volume formatted it to fat 32 and tried to use that as a fake USB . When I rebooted laptop I got the grub interface and I was happy . But I realized I had to do smth in windows but I couldn't get windows to load when I go to bios windows boot manager is at the top and it's checked . When I uncheck uefi hardware it say operating system not found . I can boot into Linux but it's iso so nothing is saved when I reboot in it . What should I do I need help real quick . For specification my laptop is dell latitude e5440 i3 4030 U