Abexo <a href="http://www.abexo.com/registry-cleaner.htm">Registry Cleaner</a> is a utility to clean and optimize Windows registry. The registry information database is where Windows and installed programs save their settings. As a result the registry is queried for information several times per second and the query time is an important factor in computer's responsiveness. Windows Vista compatible! Abexo Registry Cleaner aims at reducing the query time by detecting and removing invalid data from the registry followed by a registry compression (defragmentation). The resulting registry database will have little to no errors and often be  much smaller in size. A small registry is faster to be loaded into the memory and occupies less of the precious computer RAM. Furthermore a registry with less data is faster to be queried. Removing invalid registry entries prevents system errors and crashes. Abexo Registry Cleaner has a user friendly interface and comes with registry backup functionality.