Does your computer perform sluggish, do you experience constant freezing,
how about the blue
screens of death? These are all signs of your Windows PC experiencing
registry problems.
The registry is what in the tech industry we call the essential part of every
Microsoft operating
system, ranging from Windows 95 to Windows 8. It’s a database area that
stores information about
the hardware, software, and various configuration settings on your PC. All
the information stored
in the registry is in the form of keys and values. This is vital for the smooth
functioning of your computer. When there is a malfunction to these entries,
failures, system errors, a range of other problems start to happen. Such
instability to the system can make it unusable if the problem is not
addressed in a timely manner.
http://visihow.com/Repair_Windows_7_Black_Screen_of_Death