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i have dual boot kali linux 2.0 and window 8.1 on my laptop, on selecting kali from the grub bootloader menu it entered in to a black screen displaying following messge :

kali GNU/Kali 2.0 zain tty1
zain login:

on pressing enter curser shifted downward with following additional message:

username: (on entering some text)
password: ( keyboard hanged, not able to input)

before this i installed and updated some applications like wine,
after this i placed ms office setup in usb ( named zain) for installation in kali and then reboot into kali shown this message.
i searched for this problem but find no useful solution. Anyone please solve this problem.......