Registry Drill 

The Registry Drill is the most in-depth Registry utility and cleaner.It goes through the Registry character by character searching for any possible errors.
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CoffeeCup Privacy Cleaner 

Stop Websites and People from tracking your every Internet move. Privacy Cleaner can quickly erase your cache, cookies, history, visited Websites, typed URLs, Temp folders and more.
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RegMedic 

RegMedic can fix a corrupted Registry or install a new one, even when Windows cannot. This means no more formatting, no more reinstalling Windows. Fix all those little annoying non-function problems in Windows.
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Optimize Computer 

Keep your PC running faster, cleaner, and error free with Optimize Computer! This award wining application is a suite of 7 powerful tools designed to increase the performance of your computer. Free trial available for download.
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Advanced System Optimizer 

ASOv2 includes 30+ tools to supercharge your PC's performance, and more than 200 tweaks to customize Windows to your liking, and improve its performance. Fix PC problems and prevent them from happening again.
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NT Registry Drill 

The Registry Drill is the most in-depth Registry utility. Going through the Registry character by character searching for any possible errors.
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