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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Perfect Companion 

Removes invalid entries in thre Registry and watches for file changes. Creates an undo file when cleaning the Registry. Correctly registers DLL and OCX files
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NT Perfect Companion 

Removes invalid entries in the Registry and watches for file changes. Creates an undo file when cleaning the Registry. Correctly registers DLL and OCX files
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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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Regfixpro 

Number 1 Windows registry repair tool Regfixpro allows you to: - find invalid file/folder references in Windows 9x/NT/2000/ME/XP registry.
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FixRegistryError 

FixRegistryError undertakes complete cleaning of Windows Registry and hard drive, fixes inconsistencies in Registry and files. Optimizes your system, increase OS stability and speeds up your softwares by maintaining Registry Integrity
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