Has your system been infected by spyware / malware or viruses? Most windows systems have and been cleaned using anti-virus or other tools. Most tools simply remove the infection, but leave the registry damaged or not quite 100%. This does not cause the system to stop running, but may add some additional unexpected (unwanted) features. The following page has tools which can be used to clean / compact the registry to enable your Microsoft Windows system to run at full speed.
Wise Registry Cleaner
“This freebie does a neat job of cleaning out the Registry junk. It scans the Registry, flagging orphaned or bad Registry entries, and shows you the name and values for each.”
WinMend Registry Defrag
A free registry defragmentation and cleanup tool, simple to use, safe and reliable.
WinMend Registry Defrag is a free registry defragmentation and cleanup tool. It can rebuild registry index safely and clear waste registry space to make it easy for Windows and other applications to find data more efficiently. As Windows registry is re-organized, you will enjoy much improved operating system performance. This tool is safe, reliable, and simple to understand and use.
Auslogics Registry Cleaner
One of the most stable and reliable registry cleaners available
on the market. It is designed for fixing and repairing the
Windows registry and is absolutely FREE!
Fixes corrupt registry keys
Cleans up obsolete registry entries
Avoids system conflicts and crashes
Makes your computer running more stably
Backs up initial state of your registry