If you are experiencing problems with your PC, or it's no longer performing as it used to, the likelihood is your Windows registry is overloaded with redundant entries created by the Windows operating system or other software.
Windows communicates with its registry dozens of times every second and broken registry keys can make that communication difficult and slow.
Even moderate use of a PC running Windows could result in numerous registry keys and files spread across the Windows registry. Many of these entries are no longer needed or used by Windows and may well disrupt the smooth running of your system.
After just a few days these Windows registry keys and files can begin to accumulate and, over time, will cause your PC to slow down, trigger 'missing' .exe or .dll files messages and finally stop running altogether. If you've had your system for some time then you'll be astonished at the number of unnecessary Windows registry keys and files hanging around, just waiting to strike. Deleted programs often leave a few Windows registry keys and files littered around and these are potential problems in the making.