Checkbuttons Under Windows 10

import tkinter as tk
import tkinter.ttk as ttk

root = tk.Tk()
checked = tk.IntVar()
checked.set(1)
unchecked = tk.IntVar()
unchecked.set(0)

# check-dc.gif
check_dc = ttk.Checkbutton(root, state='disabled', variable=checked)
check_dc.grid(row=0, column=0)

# check-du.gif
check_du = ttk.Checkbutton(root, state='disabled', variable=unchecked)
check_du.grid(row=0, column=1)

#
check_nc = ttk.Checkbutton(root, state='normal', variable=checked)
check_nc.grid(row=0, column=2)

#
check_nu = ttk.Checkbutton(root, state='normal', variable=unchecked)
check_nu.grid(row=0, column=3)

root.mainloop()