The Windows Registry is like a nerve system for Windows OS, its heart, brain or soul. These experts are correct to some extent. Windows requires the Registry to work properly.
If its Registry integrity is not maintained, the computer will inevitably crash.
The Windows Registry contains information on drivers, hardware settings, services, protocols, application data, and much more.
Many Windows "gurus" recommend that all Windows systems should have Registry maintenance done every three months, possibly even more often. It is important to remove old references to items that have been removed from inventory. An individual who installs and uninstalls programs with regularity should repair the registry more often. Experts suggest doing so because installing and uninstalling software are two of the primary causes for the existence of unused or unwanted entries.
Remember to be very careful. If the Computer Registry is not repaired correctly the whole system could crash.

Registry is an important and vital role while Windows starts and is in use. If you try to %LINK3% yourself, changing, moving or deleting them damages any of the important Registry files, the result will be major problem. Multiple Registry tools possess built in backup resources for this very reason.
As a matter of fact, there is an editor built right in to the Windows Registry. Go to Start, Run, type regedit.exe, then click OK to view the built-in Registry Editor. This built-in editor allows you to easily navigate within the Registry so that you can make any changes necessary. The problem with this approach is that the typical Windows system has hundreds of thousands of Registry entries. Some are just hard to understand. You will find some to be really ambiguous while others are fraught with exceptional peril.
Regedit is missing all source of intelligence about what to change, what to delete, and what to leave alone. Regedit is not one of those people who have an idea about what is needed, significant and of use to the system. In addition, it is unable to figure out if anything is missing. That is not the best tool to fix the computer registry without the aid of some other tool.
It is not crucial to become an expert on the millions of potential entries that one might find in the Windows Registry as there are many resources provided to accomplish this particular task. Registry tools, if not all, automatically do task for you.