What Is Registry???????

What Is Registry???????

The Windows registry is a directory which stores settings and options for the operating system for Microsoft Windows. It contains information and settings for all the hardware, operating system software, most non-operating system software, users, preferences of the PC, etc. Whenever a user makes changes to Control Panel settings, file associations, system policies, or most installed software, the changes are reflected and stored in the registry. The registry contains two basic elements: keys and values. While Windows 95, 98, and Me store the registry in two files (system.dat and user.dat), Windows NT, 2000, XP, and 2003 store most registry information in files called "hives". Hives are stored permanently on the hard drive and are not necessarily the same from one computer to another. Only administrators can access hives or delegate the rights to access them. You can edit the registry from a command prompt by entering regedit (in all Windows versions) or regedt32 (Windows NT and 2000 only). The regedt32 program is the more powerful (in Windows XP and later, regedit is equivalent to regedt32), as it can also search the registry on other computers on the network.

Warning: Edit the registry at your own risk. If you make an error while editing the registry, you can potentially cause Windows to fail or be unable to boot, requiring you to reinstall Windows. Always back up the registry before making any changes.

REG files (also known as Registration entries) are text-based human-readable files for storing portions of the registry.

Now what is a Registry Cleaner?????

A registry cleaner is a type of program for Microsoft Windows operating system designed to remove redundant or unwanted items from the Windows registry. The value of registry cleaners is a debated topic with some people believing there are problems with the concept of a registry cleaner, while other people highly recommend them. Some uninstallers for Windows software do not completely remove all traces of the software from the registry. It is possible that these traces may interfere with performance or have other negative impacts. Using a registry cleaner is a way to get rid of these bits. The registry cleaner scans the registry, and picks out the unnecessary and/or damaged pieces and deletes/repairs them.

There are many registry cleaners; some are freeware while some are not. The best registry cleaner I recommend is” ccleaner” which is available for free form www.ccleaner.com.

Sources: http://en.wikipedia.org/wiki/Windows_Registry