What are the most common registry problems?
Several problems may occur within your registry which are generally related to registry fragmentation and corrupt, unused, missing, orphaned or obsolete entries. Fragmentation may be a serious problem and usually happens because certain processes continually and incrementally modify the same values within the registry.
This fragmentation may, in certain cases, be excessive and eventually registry file sizes could exceed the registry size limits imposed by Windows, possibly also causing any subsequent modifications to the registry to fail. Other registry errors include: