SESDD32.SYS

IBM OS/2 Security Device Driver is part of IBM's security system - enabler driver. Will stop install if by itself.

Network Associates has a product called 'VirusScan for OS/2'. In its User Guide's appendix 'C' is a very good description of how to modifiy the CONFIG.SYS file manually to add SES to the user's machine. DEVICE=\OS2\SESDD32.SYS