is a free tool to keep the registry clean. The tool can track down and remove unnecessary entries.

The registry is the heart and soul of any Windows system.
 
It contains information about how Windows appears and how it behaves.
Most applications use the registry to store configuration and other important data. 
New registry entries are created when an application is installed.
These entries are automatically deleted when the applications are uninstalled.
Unfortunately, it doesn't always work that way, and by no means all registry entries are removed. These entries are then superfluous, inflate the registry unnecessarily and can even slow down the system.
TweakNow RegCleaner scans the registry for unnecessary entries and can remove them. A backup can and should be created before removing such entries.

In addition, TweakNow RegCleaner offers system information too
Partitions, hard drive, memory, motherboard network, processor, video and the operating system.

The Windows Cleaner  contains a disk cleaner, disk usage analyzer, registry defragmenter, startup manager, track cleaner and an uninstall program.

{slide=New in v5.2}

• Options: Added password box to prevent unauthorized use of TweakNow RegCleaner
• Track Cleaner: Added support for Open Office 3.x
• Track Cleaner: Added support for memory dumps
• Track Cleaner: Added support for Chkdsk File Fragments
• Track Cleaner: Added support for Windows Logs
• Track Cleaner: Added support for Windows Error Reporting
• Other minor improvements and bug fixes

New in v5.1.1

• System Information: Improved motherboard, processor, memory, and video card information
• Other minor improvements and bug fixes

{/ Slide}