A database used by the Windows operating system (Windows 95 and NT ) to store configuration information. The Registry consists of the following major sections:
Most Windows applications write data to the Registry, at least during installation. You can edit the Registry directly by using the Registry Editor (regedit.exe) provided with the operating system. However, you must take great care because errors in the Registry could disable your computer.
Find out more about Your Windows System Registry in Webopedia's "Did You Know...?" section.