How to turn on cookies
To enable cookies on your web browser is quick and simple.
This section will tell you how to enable cookies (turning cookies on) and also how to disable them.
For instructions on how to turn on cookies in the most common browsers see below.
Since cookies are maintained by your web browser, the method for enabling or disabling them will vary depending on which browser you are using.
Note on Firewalls:
Some personal firewalls block cookies.
If you have firewall software running on your machine and you cannot accept cookies after making the appropriate setting changes in your browser, please make sure that your firewall settings are not blocking cookies.
Microsoft Internet Explorer 8.0 - 10.0
Select the 'Tools->Internet Options' menu item, and then open the 'Privacy' tab - you can then adjust the slider to block or allow various categories of cookie. Alternatively by clicking 'Advanced...' you can exercise finer control over the browser's behavior, choosing whether to accept, block, or prompt for cookies originating either on the website you are visiting (first party cookies) or originating from websites other than the one you are visiting (third party cookies, typically used by banner advertisements hosted on an advertiser's website).
Firefox 7.0 and newer
Use the 'Tools->Options' menu item (may be under the Firefox button), then choose the 'Privacy' tab. Set the 'Firefox will:' option to 'Use custom settings for history'. Now you can choose whether cookies are enabled for websites you visit and third party websites, and if so how long they will persist. You can also use the 'Exceptions' button to override the settings for particular websites.
Use the 'Tools->Options' menu item, then choose the 'Privacy' tab. Here you can choose whether cookies are enabled, and if so how long they will persist. You can also use the 'Exceptions' button to override the settings for particular websites.
Google Chrome 5.0
Choose 'Options' on the 'Cutomize and control' menu, then open the 'Under the Bonnet' tab. In the 'Privacy' section, click on the 'Content settings...' button and open the 'Cookies tab. Set the required cookie behaviour and use the 'Exceptions...' button (if required) to configure specific websites.
Apple Safari 5.1
Choose 'Preferences...' on the 'Settings' or 'Edit' menu (Windows) or the Safari menu (MacOS), then open the 'Privacy' tab. Now set the required cookie behaviour.
Apple iOS (iPhone, iPad)
From the home screen tap the 'Settings' icon, then choose 'Safari'. Find the 'Accept Cookies' option and set the required cookie behaviour.
Tap the 'Internet' icon to start the browser, then press the phone's menu button. From the list of options, choose 'More', and then select 'Settings', then 'Privacy and Security'. Scroll down the resulting list and check or uncheck the 'Accept Cookies' item.
Start Chrome, then open the options menu and scroll down to 'Settings', followed by 'Site setttings'. You can now choose whether to allow sites to save and read cookie data.
Windows Phone 7/8
In Internet Explorer, tap 'More...' then 'Settings'. Check or clear the 'Allow cookies on my phone' item to set the required cookie behaviour.
Open the browser from the home screen, then press the Menu key, followed by 'Options'. Under 'Privacy & Security' you can choose whether or not to 'Accept Cookies'. Press the Menu key and select 'Save' to save your selection.
Note: Disabling cookies will prevent some websites from working correctly, and may mean that you are prompted to re-enter information that would normally have been stored in a cookie.
The information above is from this source http://www.whatarecookies.com/enable.asp