A Simple Explanation of the Windows Registry

What is the Windows Registry?

The registry is a hierarchal database repository included in Windows systems to save configuration information related to all software programs and hardware devices installed on your PC. It also comprises all information related to user preferences, user profiles, and system setup. All this information is contained within the subtrees of five root keys—HKEY_CLASSES_ROOT, HKEY-CURRENT_USER, HKEY_LOCAL_MACHINE, HKEY_USERS, and HKEY_CURRENT_CONFIG. The subtree of each root key further comprises subkeys, sub-subkeys and their values.

The registry is a dynamic component and continues to build up whenever your system is operational. Data is added to and removed from the registry when you perform activities such as add or remove programs, open and add data to applications, browse the Internet, change system configuration and so on.

What Causes Registry Errors?

Registry errors occur due to the collection of redundant, outdated, and invalid data within it. Accumulation of this junk causes your registry to grow to a very large size, and eventually causes damage to its files. Some of the common causes of registry errors are:

• Installing a large number of programs that keep adding information to the registry causing it to grow to a very large size.
• Incorrect application uninstallation procedures that may leave behind orphan and obsolete keys in the registry.
• Faulty applications that add corrupt and invalid entries in the registry.
• Damage caused by unwarranted system crashes.
• Obsolete device drivers and software programs.
• Empty registry keys left behind after registry cleanup and program uninstall process.
• Fragmentation of registry files due to growing size.
• Virus and spyware infections.

How to Prevent and Fix Registry Errors

Although it is quite difficult to completely prevent registry errors, you can take some precautionary steps to control the damage. For instance, you must:

• Avoid downloading freeware applications, games and audio/video files from dubious websites.
• Always use legitimate processes to install and uninstall applications from your system.
• Perform regular hard disk maintenance using tools, such as Disk Cleanup and Disk Defragmenter.
• Remove all programs and utilities you do not require from your system.
• Maintain a clean and dust-free working area because dust can cause damage to system components, which may, in turn, cause system crashes and as a result also damage your registry.

In addition to taking the preventive measures listed above, you also need to perform regular preventive maintenance of the registry. To do this, you will have to regularly scan and remove unwanted information from the registry. Your Windows system comprises the Registry Editor (Regedit) tool that you can use to perform some manual scanning of the registry. However, this method is quite tedious and the chances of errors are quite high.

To save you from this problem and to assist millions of Windows users around the globe, there are several third-party registry cleaning tools available today. You can search for and download a tool that is compatible with your operating system and carries good user reviews, from the Internet.

Registry tools help you by automating the task of scanning and removing unwanted information from the registry. Fixing the registry using a registry cleaning tool enables you to resolve several computer errors such as stop errors, DLL errors and driver errors. The tool enables you to defrag the registry to compress its size and consolidate its files. All these registry maintenance activities, in turn, increase the speed of your PC and assure you an error-free computing experience.