A registry is the main database of the HP that stores all the information and play an important role in operating the system. It is the most important part and is necessary for the proper functioning of the program, utility, and process.
This registry file keeps a track of everything that is on your computer for its proper functioning of the program to work correctly on your HP computer. But even the registry files may get damaged and come across to corruption or simply gets overloaded with entries.
The main reason behind these registry files is an improper installation of applications, virus infection, corrupted entries of HP registry files and others.