Its ok.Nothing will happen to your comp.Some cookies are good some are bad.
Whats a cookie??
In computing, a cookie (also browser cookie, computer cookie, tracking cookie, web cookie, internet cookie, and HTTP cookie) is a small string of text stored on a user's computer by a web browser. A cookie consists of one or more name-value pairs containing bits of information such as user preferences, shopping cart contents, the identifier for a server-based session, or other data used by websites.
It is sent as an HTTP header by a web server to a web client (usually a browser) and then sent back unchanged by client each time it accesses that server. A cookie can be used for authenticating, session tracking (state maintenance), and maintaining specific information about users, such as site preferences or the contents of their electronic shopping carts. The term "cookie" is derived from "magic cookie", a well-known concept in UNIX computing which inspired both the idea and the name of browser cookies. Some alternatives to cookies exist, each has its own uses, advantages, and drawbacks.
Cookies are subject to a number of misconceptions, mostly based on the erroneous notion that they are computer programs that run on a user's computer. In fact, cookies are simple pieces of text data that affect the operation of a web server, not the client, and do so in very specific ways. In particular, they are neither spyware nor viruses, although cookies from certain sites are described as spyware by many anti-spyware products because they can allow users to be tracked when they visit various sites.
Most modern browsers allow users to decide whether to accept cookies, and the time frame to keep them, but rejecting cookies makes some websites unusable. For example, shopping carts or login systems implemented using cookies do not work if cookies are disabled.
Normal cookies are used to remember the user who is visiting the website in order to show the appropriate content. Without them, some websites would cease to function. Cookies are also used to remember the "signed on" status of users.
HTTP cookies are used by Web servers to differentiate users and to maintain data related to the user during navigation, possibly across multiple visits. HTTP cookies were introduced to provide a way to implement a "shopping cart" (or "shopping basket"),[2][3] a virtual device into which a user can store items they want to purchase as they navigate the site.
Allowing users to log in to a website is another use of cookies. Users typically log in by inserting their credentials into a login page; cookies allow the server to know that the user is already authenticated, and therefore is allowed to access services or perform operations that are restricted to a user who is not logged in.
Many websites also use cookies for personalization based on users' preferences. Sites that require authentication often use this feature, although it is also present on sites not requiring authentication. Personalization includes presentation and functionality. For example, the Wikipedia website allows authenticated users to choose the webpage skin they like best; the Google search engine allows users (even non-registered ones) to decide how many search results per page they want to see.
Tracking cookies, however, are used to track internet users' web browsing habits. Websites leave these tracking cookies on users' computers, and tracking software can determine where a user has been by viewing the cookies left on the computer. Different websites can share tracking cookies, and each website with the same tracking cookie can read the information and write new information into it. Websites that use tracking cookies continue to recreate cookies in the browser each time a site is visited.
Cookies are also used to track users across a website. Third-party cookies and Web bugs, explained below, also allow for tracking across multiple sites. Tracking within a site is typically used to produce usage statistics, while tracking across sites is typically used by advertising companies to produce anonymous user profiles (which are then used to determine what advertisements should be shown to the user).
In general, a tracking cookie is not dangerous. They may potentially infringe upon the host's privacy, but they are easily removed. A tracking cookie cannot cause any system instability. Current versions of popular web browsers include options to delete 'persistent' cookies when the application is closed.
Cookies can be used for allowing users to store preferences about a Web site.
Users select their preferences by entering them in a Web form and submitting the form to the server. The server encodes the preferences in a cookie and sends the cookie back to the browser. This way, every time the user accesses a page, the server is also sent the cookie where the preferences are stored, and can personalise the page according to the user preferences.