I get asked the same questions over and over again by people trying to find the best registry repair software tools, so I have decided to make a list of my favorite cleaners.
I am not going to rate them with stars because in my opinion they all have some unique functions that make them stand out from the crowd, but I will list them in order of personal preference.
I have checked many and struggled to bring my list down to these five.
There really are some good ones about these days.

• All of these ones have proved themselves to be efficient in use, with good customer support.
  
• All are safe to download and use.
  
• All offer a free scan.
  

Your own choice should be made bearing in mind which extra features (if any) you think you might need, on which operating system you run and perhaps personal preference.
Firstly - Registry Easy The best performing registry cleaner in many tests.
It finds more errors than just about any other cleaner and does an excellent job of fixing them.
Registry Easy will scan and repair your PC quickly.
Compatible with all operating systems from Windows 98 onwards, safe and easy to use.
Registry Easy also has a great range of tools to optimize, speed up and stabilize all aspects of your PCs performance.
Some of the utilities available with this software.

• One click maintenance.
  
• Internet and memory optimizers.
  
• Start up manager.
  
• History cleaner.
  
• Browser repair.
  

Certified 100% Spyware, Adware & Virus free.
With 24/7 technical support staff.
Secondly - RegTool RegTOOL comes a very close second in my tests.

• Jam packed full of extra features.
  
• Fast to install.
  
• Easy to put into in action.
  
• Certified for Windows Vista.
  

The interface is a little more complicated but still fairly self explanatory to use.
This one again offers a free trial scan.
Third best Registry Repair Software - With Multi Languages This is the only cleaner I have encountered so far which provides multi language options.
It is currently offering licenses for 3 computers for the price of one.
A great deal! Another good set of system tools, but some are paid extras.
The fourth cleaner is best registry repair software for 64 Bit Systems This was the only registry cleaner I found to be fully compatible with 64 bit operating systems.
A good choice for anybody who just wants a no frills, effective registry cleaner and doesn't want a lot of extra tools.
Last but by no means least is my favorite for "set and forget" Error Nuker has a very handy schedule feature so if you want to just set it to run at start up, without having to remember to run the program regularly you can.
Another simple but effective cleaner with good flexibility in choosing what errors you want fixing.