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Registry problems are the common cause of Windows crashes, error messages, and degraded performance! RegDoctor can safely and quickly clean and repair Windows registry problems with a few simple mouse clicks! RegDoctor uses an intelligent, high-performance detection engine to accurately identify missing and invalid references in your Windows registry. Identified registry problems are listed and rated by risk level using an easy to understand color-coded system for your information. You can choose to have RegDoctor automatically repair all identified problems, or more selectively choose which problems to repair immediately. RegDoctor also offers a Restore feature to create registry backup files, giving you the capability to safely undo any registry changes.

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Developer: InfoWorks Technology Company
License: Shareware
OS: Windows All
Size: 1.8 MB

Download RegDoctor 1.99

http://www.itcompany.com/regsetup.exe

Most Internet cookies are incredibly simple, but they are one of those things that have taken on a life of their own. Cookies started receiving tremendous media attention back in 2000 because of Internet privacy concerns, and the debate still rages.

On the other hand, cookies provide capabilities that make the Web much easier to navigate. The designers of almost every major site use them because they provide a better user experience and make it much easier to gather accurate information about the site's visitors.

A cookie is a piece of text that a Web server can store on a user's hard disk. Cookies allow a Web site to store information on a user's machine and later retrieve it. The pieces of information are stored as name-value pairs.

For example, a Web site might generate a unique ID number for each visitor and store the ID number on each user's machine using a cookie file.

If you use Microsoft's Internet Explorer to browse the Web, you can see all of the cookies that are stored on your machine. The most common place for them to reside is in a directory called c:\windows\cookies.

cookie data is simply name-value pairs stored on your hard disk by a Web site. That is all cookie data is. The Web site stores the data, and later it receives it back. A Web site can only receive the data it has stored on your machine. It cannot look at any other cookie, nor anything else on your machine.

The data moves in the following manner:

If you type the URL of a Web site into your browser, your browser sends a request to the Web site for the page.

For example, if you type the URL http://www.amazon.com into your browser, your browser will contact Amazon's server and request its home page.
When the browser does this, it will look on your machine for a cookie file that Amazon has set. If it finds an Amazon cookie file, your browser will send all of the name-value pairs in the file to Amazon's server along with the URL. If it finds no cookie file, it will send no cookie data.
Amazon's Web server receives the cookie data and the request for a page. If name-value pairs are received, Amazon can use them.
If no name-value pairs are received, Amazon knows that you have not visited before. The server creates a new ID for you in Amazon's database and then sends name-value pairs to your machine in the header for the Web page it sends. Your machine stores the name-value pairs on your hard disk.
The Web server can change name-value pairs or add new pairs whenever you visit the site and request a page.

There are other pieces of information that the server can send with the name-value pair. One of these is an expiration date. Another is a path (so that the site can associate different cookie values with different parts of the site).

You have control over this process. You can set an option in your browser so that the browser informs you every time a site sends name-value pairs to you. You can then accept or deny the values.

Cookies evolved because they solve a big problem for the people who implement Web sites. In the broadest sense, a cookie allows a site to store state information on your machine. This information lets a Web site remember what state your browser is in. An ID is one simple piece of state information -- if an ID exists on your machine, the site knows that you have visited before. The state is, "Your browser has visited the site at least one time," and the site knows your ID from that visit.

Web sites use cookies in many different ways. Here are some of the most common examples:

Sites can accurately determine how many people actually visit the site. It turns out that because of proxy servers, caching, concentrators and so on, the only way for a site to accurately count visitors is to set a cookie with a unique ID for each visitor. Using cookies, sites can determine:
- How many visitors arrive
- How many are new versus repeat visitors
- How often a visitor has visited
The way the site does this is by using a database. The first time a visitor arrives, the site creates a new ID in the database and sends the ID as a cookie. The next time the user comes back, the site can increment a counter associated with that ID in the database and know how many times that visitor returns.
Sites can store user preferences so that the site can look different for each visitor (often referred to as customization). For example, if you visit msn.com, it offers you the ability to "change content/layout/color." It also allows you to enter your zip code and get customized weather information. When you enter your zip code, the following name-value pair gets added to MSN's cookie file:

Cookies are not a perfect state mechanism, but they certainly make a lot of things possible that would be impossible otherwise. Here are several of the things that make cookies imperfect.
People often share machines
Cookies get erased
Multiple machines

There are two things that have caused the strong reaction around cookies:

On a Web site, the site can track not only your purchases, but also the pages that you read, the ads that you click on, etc. If you then purchase something and enter your name and address, the site potentially knows much more about you than a traditional mail order company does. This makes targeting much more precise, and that makes a lot of people uncomfortable.
The second is unique to the Internet. There are certain infrastructure providers that can actually create cookies that are visible on multiple sites. DoubleClick is the most famous example of this. Many companies use DoubleClick to serve banner ads on their sites. DoubleClick can place small (1x1 pixels) GIF files on the site that allow DoubleClick to load cookies on your machine. DoubleClick can then track your movements across multiple sites. It can potentially see the search strings that you type into search engines (due more to the way some search engines implement their systems, not because anything sinister is intended). Because it can gather so much information about you from multiple sites, DoubleClick can form very rich profiles. These are still anonymous, but they are rich.
DoubleClick then went one step further. By acquiring a company, DoubleClick threatened to link these rich anonymous profiles back to name and address information -- it threatened to personalize them, and then sell the data. That began to look very much like spying to most people, and that is what caused the uproar.

So to prevent being exploited by the cookies,one needs to exercise caution in the sites that one surfs on the net

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