To attain its Optimal Performance and to Avoid Common Computer Issues, Registry Cleaner is the main answer to all your PC problems
You can visit there website, Registry Easy and you can try their Free Scan Inside, Try it out...
Regzooka
from Bluepenguinsoftware.comProduct description
If you are experiencing any errors in your computer such as dll errors, startup errors, application errors, runtime errors, invalid file, missing files, sound problems, missing fonts, empty registry keys, invalid Active X keys, or any computer crashes, RegZooka is all everything you need.
It is a registry cleaning product that is designed to remove all obsolete or unused entries in your registry system of your computer. It is compatible to all Windows operating system and works on the errors found in your Windows registries. 
Runtime errors: happen when a program is trying to run in your computer system.
Dll errors: occurs when there is an improper installation or removal of programs in your computer.
Exe errors: common in any incorrect system registry entries.
Blue screen errors: consider as the worst error that can only be fix by putting your computer off.
Windows installer errors: caused by a failed software installation.
Windows explorer errors: happens on the interface of your operating system.
Internet browser errors: caused by improper browser settings in your internet access.
ActiveX errors: it is due to misconfigured add-ons.
Invalid file errors: these are files that are missed and damaged.
Invalid shortcuts: these are shortcuts that are no longeer exist in your system.
Access violation: occurs once you accidentally access any authorized program that you should not access it.
System32 error: caused by any corrupt or missing system files.
Product Research
Same with the other Registry cleaner, RegZooka removes all entries in your system registry that interrupts the good performance of your computer.
In this software, once you mistakenly remove an important registry in your system, it may affects its performance. But it has its own backups that can be restored in change you commited any error change in your system.
There are lots of negative comments found on various forums in the net such as the answer forum in Yahoo. Quoted in Yahoo Answers “stay away from it” and “it is very unsafe”. Though this product states that it is supported by an IT professional. Those statements seems to be going in an opposite direction.
With all these negative feedback, the testimonials that can be found in Regzooka site speaks of the truth. The manufacturer of the said product do offers warranties and guarantees. It clearly shows that those negative feedback, are due to the errors of the user in using the product and not the software has a problem
It is better to have a knowledge about the registry and those database that can be found inside of it. It is very important to know all of these to make Regzooka works effectively in your computer. Though the products' interface are user-friendly, always remember that before doing anything in your registry always do it with caution and guidance so that you will not commit any further error on it. Read everything about how to use Regzooka Cleaner software.
Have you used this product?
If so please leave a comment below.