It stores records of all the computer activities, configurations, and preferences. It is comparable to a humongous systematic recording machine that keeps information of users' every movement. Every successful or failed attempt to install or uninstall a program or hardware has a great impact on the database.
The problem starts when the database becomes over populated and without any remedy or solution this situation can lead to fatal error or corruption of the registry system crash. To prevent situations like this reputable registry cleaner software programs were introduced as solution.
A cleaner automatically scans and detects all errors such as orphans from unsuccessful software uninstall, malicious wares from the email attachment download, and so on and so forth. Before it resumes to fixing, the errors the cleaner will first back up the current database in case something goes wrong. During the process of fixing errors an effective cleaner should be able to efficiently defrag and organize the data from the hard drive in such a manner that the computer can almost immediately access the registry that it needs. The thoroughness of a registry cleaner is depends on the number of errors it was able to identify and the number errors it was able to fix.
There are many free downloadable cleaners that scan computers to give an initial assessment of the existing errors. To remove all the errors detected the user must buy the full version of the said program. Note that every registry cleaner has its own way of finding errors and has its own way of counting errors as well. Registry cleaner with higher error result does not mean that it is more thorough.
When looking for the most suitable cleaner for your needs take time to check out reputable registry cleaner reviews.