Re-indexing is the process of recreating the index files for your databases. These files are responsible for the ordering of your databases but they can be quite temperamental, and if your computer crashes or there is a power surge, these files can be easily corrupted. You may notice that you are getting unusual error messages when in the system, such as 'Index out of date' or 'Index does not exist'. These errors can be fixed by running the re-indexing routine.
To Re-Index the Databases