Hard disks not opening

I have a dual boot ubuntu 14.04-windows 8.1 system.
First i installed windows and then ubuntu.
and the ubuntu boot loader was coming every time as usual.
then i had some problem and re-installed my windows.
after that both ubuntu and windows are showing the boot loader.
now if i log in to ubuntu, hard drives are not opening..
saying that windows is not shut down properly.
if i enter into windows and RESTARTS the system and log in to ubuntu, hard disks are opening..
but if the windows is SHUT DOWN and if i try to log in ubuntu first, hard disk problem is coming.
please help me to solve the problem and please give a solution to get rid of the windows boot loader too..

THE FOLLOWING ERROR COMES WHEN I TRY TO OPEN ONE OF MY HARD DRIVES

Error mounting /dev/sda2 at /media/dileesh/AC3E91E93E91ACB8:
 Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,
uid=1000,gid=1000,dmask=0077,fmask=0177" "/dev/sda2"
"/media/dileesh/AC3E91E93E91ACB8"'; exited with non-zero exit
status 14: The disk contains an unclean file system (0, 0).
Metadata kept in Windows cache, refused to mount.
Failed to mount '/dev/sda2': Operation not permitted
The NTFS partition is in an unsafe state. Please resume and shutdown
Windows fully (no hibernation or fast restarting), or mount the volume
read-only with the 'ro' mount option.