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I'm looking for open source or freeware registry defrag app, preferably one who doesn't need a stupid .exe installer. .zip packed and ready to go prefered!

I'm using Windows 7.

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3 Answers 3

up vote 8 down vote accepted

PageDefrag is from the Sysinternals Suite and does what you're looking for.

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Ugh, I forgot to mention I'm using Windows 7 –  Don Salva Jul 27 '10 at 14:42
PageDefrag runs on W7 –  Moab Jul 27 '10 at 14:53
That may very well be, but I don't trust an app designed for XP/2000 registry architecture to run on Win7 registry architecture. I'm paranoid. –  Don Salva Jul 27 '10 at 15:01
Not on 64bit W7. –  AndrejaKo Jul 27 '10 at 15:01

Well your paranoia will probably make this suggestion useless, but if you don't mind the known issues (no UAC and a minor fixable error), the venerable NTREGOPT will work on Windows 7...

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Confirmed to work and not break anything on Windows 7 x64. –  Tom Wijsman Jul 29 '10 at 19:30
The site says to turn off UAC, but running it as an admin is just fine. –  Tom Wijsman Jul 29 '10 at 19:32

Emergency Boot CD: http://www.prime-expert.com/ebcd/

It can defragment Windows 7/Vista/XP/2000/NT4 registry in two modes: "Optimize for speed" and "Optimize for size".

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