The Windows Registry is a central hierarchical database in windows used to store information necessary to configure the system for one or more users, applications and hardware devices. Registry contains information that is constantly referenced during operation, such as profiles for each user, the applications installed on the computer; and the types of documents each can create property sheet settings for folders and application icons, what hardware exists on the system; and which ports are being used.

Windows Registry is a vital part of Windows, if it is damaged; your whole system may be corrupted and cannot be used.

Causes of a damaged Windows registry:
• Installing / Uninstalling software applications
• Programs that did not get correctly installed or uninstalled
• Adding / Removing hardware devices
• Failing to completely remove corrupt or obsolete drivers