Even though It's Willem said you can't you can. First, before I respond, I need to know: Do you have multiple hard drives, or at least 1 TB of space. If not, it would not be smart to follow through doing this. If you do...
sudo apt-get install gparted
Then open gparted in your search bar and create a new partition, leaving at least 500 GB for the windows installation. Then once you have that partition made..
sudo gedit /etc/fstab
You don't have to use gedit, I just like the simplicity.
You should see a line at the bottom that looks like this:
/dev/sda1 /home ext4 defaults 0 1
Copy that information from your new partition, and make that line. Then save, and exit.
Finally do
mount -a
Then SHUTDOWN. DO NOT REBOOT.
Obviously turn your computer back on. Login, and do
df
You should now see a new drive, mounted on whatever file. You now have this partition to use for a Windows Installation. There you go!
sudo parted -l
Windows only installs to gpt partitioned drives with UEFI and to MBR drives with BIOS. And Windows 7 default install is BIOS, but you can copy to flash drive & edit to make it an UEFI installer. If BIOS, Windows must be installed to a primary NTFS partition with the boot flag(active partition in Windows speak). help.ubuntu.com/community/…