User Guide

AntiViral Toolkit Pro
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OVL File
A file containing executable code which may be used by a calling program. It
often has a COM or EXE file structure.
SYS File
A system device driver file. It is loaded into memory when DOS initializes after
boot-up. System files are loaded as instructed by DEVICE commands in the file
CONFIG.SYS which are actioned during boot-up.