1)   OK Registry Cleaner 2.0
Ok Registry Cleaner is an award-winning Windows Registry Cleaner that helps you scan your PC , safely fix the registry errors & invalid entries causing system slowdown , freezing, and crashing.
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 2)   Vista Registry Cleaner 4.7.0
Digeus Registry Cleaner for Windows Vista, a PC maintenance and recovery tool that eliminates system error messages, slow startup and shutdown speed, programs instability and computer crashes.
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 3)   Digeus Registry Cleaner 5.5
Digeus Registry Cleaner is a PC maintenance and recovery tool that eliminates system error messages, slow startup and shutdown speed, programs instability and computer crashes.
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