[Update] 2016-1-18

Manjaro 15.12 update-pack 4:

Included in this update:
KDE Framework - 5.18
KDE Apps - 15.12.1
Mesa, SQLite, Hasekell and Python packages got updated.
fixed some issues in QT5.
added some needed firmware to the manjaro-firmware package.
fixed some issues in Plasma Desktop.

Supported Kernels:[list]
[]Linux310 3.10.94
]Linux312 3.12.52
]Linux314 3.14.58
]Linux318 3.18.25
]Linux41 4.1.15
]Linux43 4.3.3
[*]Linux44 4.4.0
This update also includes the usual Archlinux upstream fixes as of Sun Jan 17, 2016.

You can use Discover, Octopi or the command line for this update:

sudo pacman -Syu

Official Manjaro anouncement: https://manjaro.github.io/Update-2016-01-18_(stable)/
Official Manjaro forum thread: https://forum.manjaro.org/index.php?topic=30303.0

With last update (or may be with the kernel update) I have lost the windows entry
in the grub boot loader. Instead it now has an advanced option showing two kernels.
I can access the windows partitions from within linux, though. So it seems
only the boot record has been altered by the recent update.

Could someone help to restore the windows entry in grub men~?

thanks in advance.

sudo update-grub

Thank you. That solved the problem.