
Basically what garmanma has said is exactly true. Registry Cleaners say they speed up your computer when if actuall fact - they don't (Generally if they do, it is very very slight)
Here are some posts regarding pretty much the same as this one (Read what some other members have said:
http://www.bleepingcomputer.com/forums/ind...egistry+Cleanerhttp://www.bleepingcomputer.com/forums/ind...egistry+Cleaner(These links are only a few amongst many so your not the only one

)
The risks they involve, are ones the average home user shouldn't be taking so it is best if you try stay away from them

Also I see you have an active HijackThis log posted and by using a registry cleaner of some sort will be making changes to your system which will affetc your HJT log - you shouldn't be making changes to your system if you have an active HijackThis log posted

Please be patient as the HJT Team are busy but don't worry, someone will get to your log

David