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Registry Error – What does it mean?
Registry Errors – Is my PC corrupted?
If you haven't seen your computer crash and display registry error message it doesn't mean that you don't have registry errors on your PC. It might be just a matter of time!
The Windows Registry is a database that stores critical information and settings for all the hardware, software, users, and preferences on your Windows PC.
Over time, the registry grows and can become corrupted as software and hardware is added and removed from your computer. This corruption can occur for many reasons including being left-behind after the un-installation or incorrect removal of software, by missing or corrupt hardware drivers, or orphaned startup programs.
These registry errors usually lead to slow unpredictable operation and can cause crashes for no reason or PCs that refuse to startup at all.

Over time the registry becomes larger and larger as new programs are installed, used and removed. The design of the registry is such that when you add some data into the registry it becomes larger, but when you remove this data the registry will not shrink back to its previous size. Why? When a registry entry is removed, that entry is simply marked as blank but remains in place, introducing a gap into the registry. In this way the registry becomes more and more fragmented over time. Registry fragmentation causes overall system performance to decrease. Systems with a fragmented registry will take longer to boot and will use more memory just for processing the registry, resulting in decreased overall performance as other programs are forced to use much slower virtual memory.