Cookies are bits of information we store on your computer to make the website easier to use. These may be settings [the fact you are logged in and can access full functionality]; or items in your basket when shopping; or to help us collate anonymous data on usage of the site to plan improvements. We only set cookies for these reasons. Cookies cannot allow us access to your files on your computer. You can stop Scran setting cookies but this will prevent parts of the site working.
The following links give you information on controlling the settings of Cookies in several popular browsers: