Windows 注册表(Windows Registry)是一个数据库，位于system32 文件夹中，用于存储所有系统配置和设置。在一段时间内，您最终会在计算机上安装和卸载多个软件。很多时候，您调整或更改系统设置，然后将它们改回来 - 所有这些都可能导致注册表项损坏、孤立键和注册表(Registry)中的无效条目。此外，当您使用Registry Cleaner删除此类无效注册表项时，(Registry Cleaner)注册表(Registry)及其配置单元中会留下空白空间。
免费的注册表碎片整理程序
注册表碎片整理程序(Registry Defragmenters)有助于删除此类臃肿的注册表配置单元和空白空间并压缩注册表。我们已经看到注册表碎片整理是否有用。如果您决定使用注册表碎片整理程序(Registry Defragmenter)对Windows 注册表(Windows Registry)进行碎片整理，这里有一些您可能想要查看的免费的。
1] Auslogics 注册表碎片整理
注册表非常像硬盘驱动器。每当您开始在计算机上工作时，程序都会经常访问注册表。由于条目的添加和删除，注册表可能会随着时间的推移产生无效条目并变得臃肿和碎片化。在某种程度上，分散的注册表可能会降低计算机性能。Auslogics Registry Defrag可以对(Auslogics Registry Defrag)Windows进行碎片整理和压缩注册不到一分钟。该程序将扫描注册表，删除空闲空间并减小注册表的大小。该程序还提供删除您的垃圾文件。它似乎是唯一提供漂亮 UI 并向您展示注册表碎片的免费软件。它还会在开始操作之前先自动创建一个系统还原点，这在我看来是件好事。
我偶尔使用过这个注册表碎片整理免费软件，发现它非常安全。
安装此免费软件时，请记住取消选中将 Ask 设为默认搜索提供商并将 Ask.com 设为主页的选项。(While installing this freeware, do remember to uncheck the options to make Ask your default search provider and Ask.com your home page.)
2]免费注册表碎片整理
免费注册表碎片整理(Free Registry Defrag)将通过消除间隙和浪费的空间来帮助压缩和优化您的注册表，以提高系统性能。我有时也使用过这个注册表碎片整理程序，发现它很安全。
3] Registrar Registry Manager Lite
Registrar Registry Manager Lite是一款免费工具，适用于需要经常使用Windows 注册表(Windows Registry)的系统管理员和高级用户。此工具提供了一个完整且安全的解决方案，用于在您自己的桌面以及网络上的远程计算机上使用和维护注册表。它还包括一个注册表碎片整理程序，以及许多其他管理注册表的工具。
4]注册表压缩器
与其他程序一样，Registry Compressor也不会删除或向注册表添加任何内容。它将注册表重建为新文件，结果所有额外空间都消失了，注册表更小。
5] WinUtilities 注册表碎片整理
WinUtilities Registry Defrag将检查您的注册表的碎片化程度。在分析开始之前，您将被告知关闭所有其他应用程序。您应该这样做，因为在运行Registry Defrag后对注册表所做的任何更改在重新启动后都会丢失。
6]使用免费的注册表碎片整理
Eusing Free Registry Defrag可以对(Eusing Free Registry Defrag)Windows 注册表(Windows Registry) 进行碎片整理和压缩。它会扫描注册表以删除任何空闲空间，减少注册表大小并最终减少注册表占用的RAM量， (RAM)Eusing Free Registry Defrag是一款免费的注册表碎片整理软件通过消除Windows注册表文件中的空白、碎片和浪费空间来优化注册表。
7]NTREGOPT
NTREGOPT是Windows XP时代流行的注册表优化软件。只有当您关闭用户帐户控制(User Account Control)并以适当的管理权限运行它时，它才能正常工作。
8]页面碎片整理
(PageDefrag)Sysinternals 的PageDefrag将对分页(Paging)和注册表(Registry)文件进行碎片整理。标准(Standard)的碎片整理程序既不能显示页面文件或注册表(Registry)配置单元的碎片程度，也不能对它们进行碎片整理。分页(Paging)和注册表(Registry)文件碎片可能是与系统中的文件碎片相关的性能下降的主要原因之一。它使用先进的技术为您提供商业碎片整理程序无法提供的功能，让您能够查看页面文件和注册表(Registry)配置单元的碎片程度，并对其进行碎片整理。
PageDefrag 自 2006 年以来未更新，因此可能无法在较新版本的 Windows 上运行。(has not been updated since 2006 and therefore may not work on newer versions of Windows.)
除了上述注册表碎片整理程序外，许多软件，如 Registry Recycler Portable - 以及一些免费的Windows 优化器(Windows Optimizers)，都 将注册表碎片整理(Registry Defragmentation) 软件作为其套件的一部分。
如果您使用注册表碎片整理程序或想推荐任何特定的，请告诉我们。(Do let us know if you use Registry Defragmenters or would like to recommend any particular one.)
Free Registry Defragmenter to defrag Windows Registry
The Windows Registry is a database, located in the system32 folder, that stores all system configurations and settings. Over a period of time, you do end up installing and uninstalling several software on your computer. many times, you tweak or change system settings, and change them back – all this can result in broken registry keys, orphaned keys, and invalid entries in the Registry. Moreover, when you remove such invalid registry entries using a Registry Cleaner, empty spaces are left behind in the Registry and its hives.
Free Registry Defragmenter
Registry Defragmenters help in removing such bloated registry hive & empty spaces and compacting the registry. We have already seen whether Registry defragmentation is useful or not. If you do decide to use a Registry Defragmenter to defrag Windows Registry, here are a few free ones that you may want to check out.
1] Auslogics Registry Defrag
The registry is very much like hard disk drives. Whenever you start working on your computer, programs access the registry very often. Due to the addition and deletion of entries, the registry may develop invalid entries and get bloated and fragmented over time. To an extent, a fragmented registry could reduce computer performance. Auslogics Registry Defrag can defragment and compact the Windows registry in less than a minute. The program will scan the registry, remove slack spaces and also reduce the size of the registry. The program also offers to delete your junk files. It appears to be the only freeware that offers a nice UI and shows you the fragmentation of the registry. It also automatically creates a system restore point first before starting the operation, which is a good thing in my opinion.
I have used this registry defragmentation freeware, on occasions and found it to be pretty safe.
While installing this freeware, do remember to uncheck the options to make Ask your default search provider and Ask.com your home page.
2] Free Registry Defrag
Free Registry Defrag will help in compacting and optimizing your registry by removing gaps and wasted space, in order to improve the system performance. I have used this registry defragger too on occasions and found it to be safe.
3] Registrar Registry Manager Lite
Registrar Registry Manager Lite is a free tool for system administrators and power users who need to work with the Windows Registry frequently. This tool offers a complete and safe solution for working with and maintaining the registry on your own desktop as well as remote computers on your network. It also includes a registry defragger, along with many other tools to manage the registry.
4] Registry Compressor
Like other programs, Registry Compressor too does not remove or add anything to the registry. It rebuilds the registry to new files, as a result of which all extra space is gone and the registry is smaller.
5] WinUtilities Registry Defrag
WinUtilities Registry Defrag will check how fragmented your registry is. Before the analysis starts, you will be informed to close all other applications. You should do so because any changes made to the registry after Registry Defrag has been run are lost after the reboot.
6] Eusing Free Registry Defrag
Eusing Free Registry Defrag can defragment and compact the Windows Registry.. It will scan through the registry to remove any slack space, reducing the registry size and ultimately the amount of RAM the registry takes up, Eusing Free Registry Defrag is a free registry defragmentation software that optimizes registry by removing gaps, fragments and wasted space in Windows registry files.
7] NTREGOPT
NTREGOPT is a registry optimization software which was popular during the Windows XP days. It will only work correctly if you turn off User Account Control and run it with proper administrative privileges.
8] PageDefrag
PageDefrag from Sysinternals will defrag Paging & Registry files. Standard defragmentation programs can neither show you how fragmented your paging files or Registry hives are, nor defragment them. Paging and Registry file fragmentation can be one of the leading causes of performance degradation related to file fragmentation in a system. It uses advanced techniques to provide you what commercial defragmenters cannot and that is the ability for you to see how fragmented your paging files and Registry hives are, and to defragment them.
PageDefrag has not been updated since 2006 and therefore may not work on newer versions of Windows.
Apart from the above-mentioned registry defragmenters, many software like Registry Recycler Portable – as also some free Windows Optimizers include a Registry Defragmentation software as a part of their suite.
Do let us know if you use Registry Defragmenters or would like to recommend any particular one.
