Tip: has nothing to do with weddings
What is Windows Registry? (regedit.exe)
The registry is a database of all the settings that the Microsoft Windows operating system, its applications, and hardware drivers use to manage their configurations.
The registry is in many ways the heart of Windows. Power users can use it to make their computers do things that would otherwise be impossible.
Warning: Making changes to the registry can break your computer. You should only make changes that you are comfortable with, and you should always back up the registry beforehand.