在 /boot/grub2/grub.cfg 文件末尾加入下列内容：
# (2) Windows XP
menuentry "Windows XP" {
set root="(hd0,msdos1)"
chainloader +1
}相关链接：https://wiki.archlinux.org/index.php/GRUB_%28%E7%AE%80%E4%BD%93%E4%B8%AD%E6%96%87%29#UEFI-GPT_.E6.A8.A1.E5.BC.8F.E4.B8.8B.E5.AE.89.E8.A3.85.E7.9A.84Windows.E7.9A.84.E5.90.AF.E5.8A.A8.E9.A1.B9