Free to try (Only fixes 15 errors); $19.99 to buy (Buy it now)
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PerfectRegistry cleans such invalid registry errors using its advanced scan engine. It not only fixes invalid registry entries, it also defragments the registry, keeping it streamlined for smoother system performance. You don't have to be a computer expert to use PerfectRegistry. The interface makes it easy to fix all registry errors easily and quickly even for novice users.
None can' recommend anything positive to say about defragging the registry performance gains none
Sadly it's just another program marketed to to sell registry cleaner products, registry cleaners only remove a very small number of unused keys, which won't help performance when you consider the hundreds of thousands of keys in the registry.
Wise Registry Cleaner free built in registry cleaner and defrag optimize program if you think it will make you sleep better at night .