"boot device not found" after manually changing grub.cfg for dual boot

I tried to dualboot window with Ubuntu for that i edited the Grub.cfg file just i added This the code I wrote there in Grub cfg file

After that, i restarted my laptop and getting this kind of error as: Now laptop window shows like this

Please help me to solve the problem

Mine looks like this:

menuentry "Windows 10" --class windows --class os $menuentry_id_option 'osprober-efi-F024-2799' {
    insmod part_gpt
    insmod fat
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root  F024-2799
    else
      search --no-floppy --fs-uuid --set=root F024-2799
    fi
    chainloader /EFI/Microsoft/Boot/bootmgfw.efi
}

and it works. So this is for a GPT based installation. If yours installation is GPT as well, I would suggest you change your config-file. ( The number of the root uuid you have to change in your number of course. For that see the entry of the "01 Header¨ or your "10_Linux_Proxy" in the config-file. ). You will have to do this with root privileges, otherwise you cannot change the file ( it is read only for normal user and read/write for root ). But this you probably knew, because you changed your file.