Drive map problem, NW4.11,Client3.3,98SE

I have recently had to reinstall Client 3.3 on a Win98SE machine. Before the reinstall, an external Zip was using “I:”. With the reinstall, “I:” is being mapped to SYS. Have moved the Zip to “F:” but “I:” still gets mapped to SYS for no apparent reason. First network drive is “G:”, no login scripts exist. Mapping occurs only on system startups, not at logins. Any help would be appreciated.