Enable cookies in Internet Explorer
Select the 'Tools->Internet Options' menu item, and then open the 'Privacy' tab - you can then adjust the slider to 'Normal'.
Alternatively by clicking 'Advanced...' you can exercise better control over the browser's behaviour, choosing whether to accept cookies originating either on the website you are visiting (first party cookies) and originating from websites other than the one you are visiting (third party cookies).
Enable cookies in Firefox
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'. Set cookies enabled for websites and accept third party cookies.
Enable cookies in Google Chrome
Choose 'Settings' on the menu. Scroll down and click on ‘Show advanced settings’. In the 'Privacy' section, click on the 'Content settings...' button, open the 'Cookies' tab and allow cookies.
Enable cookies in Apple Safari
Click 'Edit' menu (Windows) or the Safari menu (Mac), choose 'Preferences', and open the ' Security ' menu. Select for 'Accept cookies' the option 'Always'.