During the normal operation of a Windows system, registry data is
constantly being written to and removed from the registry. Over time
this data becomes scattered within the registry file and when
information is deleted from the registry holes are left which fragment
the data within the registry. Free Registry Defrag optimizes your
registry by removing gaps and wasted space, thus improves the whole
system performance. Note that administrator rights is required for this
program to run, and you will be required to reboot after the registry
is compacted.