Free Registry Defrag
Full user review
Compacts registry and tells you after you scan if it even need a defrag so your not doing it for no reason
Forces a restart after the scan
Great tool I would recommend to anyone, you do have to be patient while it scans and it even says that it is not a good idea to use the computer while the process is taking place. after the scan it will tell you if it needs a compacting and how much space (if you need to do it) you will save by running the defrag. after that completes and you compact the registry the program will say it is finished, you hit an OK button and it instantly restarts so be careful if you were working on anything because you might lose it. overall very compact light weight and simple its best if you get a registry cleaner like ccleaner to help find old registry files so this program can be most effective. using this program may speed up your computer if has been sluggish lately. give it a try!