Clean the Registry - The Old Skool Way

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Here's a little trick to clean your registry for useless references:

Open a DOS prompt:

C:\>REGEDIT /E C:\REGFILE.TXT
C:\>REGEDIT /C C:\REGFILE.TXT

The first line will export the registry to a text-file (regfile.txt).
The second line restores the registry from that text-file. A nice "side-effect" of this method is that this will screen the programs in regfile.txt to check if they still exist. If they don't, they aren't restored.