The reinstallation process has changed from the one described in the N4373A User's Guide. In section "Restoring the LCA files" in chapter "Reinstalling the Lightwave Component Analyzer software on the ENA" on page 99, the steps 1 and 2 are replaced by a single step. The only step to do is the execution of the installation package "ENA-LCA Setup.exe" from this CD directory. Simply run the installation procedure without changing the default settings.