The Windows Registry is an indispensable file that stores a huge collection of details about your computer.
It starts by storing the following: where all the programs are stored, which programs are shared in various applications, all the shortcuts of the Start-menu, and the pointers to various programs that start when you click an icon.
Everything you do while on a Windows computer is stored somewhere in the Registry.
For example, if you go to a website that website's URL will be recorded.
The problem is that Windows does not do an good job in organizing all these entries.
New entries are constantly being added but the old entries remain and become cluttered.
What makes it even worse is that a lot of applications are too cumbersome to uninstall all the entries they create.
They are left behind and add more clutter.
All of this in turn will eventually make your computer operate at a much lower speed then when it was brand new and had a clean Registry.
There are many programs out there that will clean up the Registry for you.
You have to make sure you know what you are doing though.
A lot of times people mess around and create more harm then good.
Deleting the wrong program or file can prove to be costly.
You should only trust a Windows Registry cleaner that is proven to work and has stellar reviews.
If you have any doubts about using one you should let somebody that knows what they are doing look at your computer instead.