A cookie is a piece of text stored on your computer by your web browser. Cookies are used by lots of websites for authentication and storing site preferences. They aren't a danger to your computer, they aren't viruses and won't generate spam.
However if you would like to remove cookies on your computer, this can be done easily. Most modern browsers allow users to decide whether to accept them, and the time frame to keep them.
The guide below will tell you how to disable cookies for the main internet browsers.
Select Tools (or the gear icon), Internet Options, Privacy. You can choose from options including ‘Accept all cookies’, ‘Block all cookies’ and intermediate settings that affect cookie storage based on privacy and whether cookies allow third parties to contact you without your explicit consent.
Select Options, Privacy. Select ‘Use custom settings for history’. This will bring up additional options where you can uncheck ‘Accept cookies from sites’ or set exceptions, ‘Accept third party cookies’, and decide how long cookies will be stored. You can also see the list of stored cookies and delete those you don’t want. You also have the option of deleting all cookies either from the history window or the privacy window. Permissions for blocking or allowing cookies for single sites can also be set via the Permissions tab.
Click the spanner icon on the browser toolbar. Choose Settings, Under the hood. Find the Privacy section and click on Content settings. Then click on ‘Cookies’ and you will get four options allowing you to ‘Delete cookies’, ‘Allow’ or ‘Block all cookies by default’ or set cookie preferences for particular sites or domains.
To block cookies or change cookie settings in Safari 5.0 and earlier, go to Preferences, Security and then Accept cookies. You can choose from ‘Always’, ‘Only from sites you navigate to’ or ‘Never’. In Safari 5.1 and later go to Preferences, Privacy. In the Block cookies section choose ‘Always’,’Never’ or ‘From third parties and advertisers’.