If you are using Internet Explorer, then follow these steps to disable cookies:
a. Open Internet explorer.
b. Click on tools and then click on Internet Options.
c. Click on the Privacy tab.
d. Move the slider to a setting desired. Options range from Block All Cookies to IE8 to Accept All Cookies.
There are also options under Advanced where you can customize the settings.
e. If you move the slider to the bottom, it will disable cookies.
f. Click on Apply and then click Ok.