Maintenance of System
Scandisk should be run from the DOS prompt as often as possible (say, every week, or so depending on amount of program use). First go to DOS prompt (see "DOS Prompt, how to reach"). Then simply type "scandisk" to run this utility.  
2)  As the database of user information grows, it becomes useful to run the index regeneration report (item "12" from Administrator's Menu) at regular intervals (once a week or so). This "tightens" the indexes and allows the program to run smoother.
3)  "Fix Patron Snags" report (item "13" from Administrator's Menu) cleans out any bad patron records that slip through (e.g. patron by mistake scanned in barcode number in the "First Name" field).