Nonfunctional GRUB menuentry for Windows multibooting

[hyperfekt]

Qubes OS version (e.g., R3.2):

R3.2

---

Expected behavior:

After following the instructions on the Multibooting docs page for Windows, selecting Windows in GRUB will boot Windows.

Actual behavior:

Upon selecting the menu entry, the computer resets.

Steps to reproduce the behavior:

1. Install Windows 10 on an MBR-partitioned disk.
2. Install Qubes alongside it, with all partitions created automatically.
3. Follow the instructions at doc/multiboot/#windows
4. Reboot
5. Select Windows menu entry

General notes:

A configuration that fixed the issue and booted into Windows as expected looks like this:

menuentry "Windows" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdosX)'
chainloader +1
}

(Change X to reflect the relevant system partition.)