A week later, the supervisor left on vacation. On June 19, one day after the supervisor picked up the virus, a coworker's computer was used to access an infected annual report prepared by the supervisor. Apparently, that document was never closed properly, perhaps by the system shutting down improperly. A scan for viruses on the computer of the secretary that supported these staff members revealed no contamination. It is uncertain if any infected files were copied from one of these staff members' computers onto a diskette and taken elsewhere.
Lessons Never use an untrusted diskette without first scanning it for viruses.
Every Windows95 computer in the MSC has software installed that enables the user to do this. The Macintosh computers in the MSC have software installed that automatically does this. If you are asked about disabling macros when opening a document in Microsoft Word, select the option that will disable the macro unless you are absolutely certain that the document is supposed to contain macros. If you disable macros or are uncertain about what to do, immediately contact MSC Computer Operations. It was good in this case that the initial staff member contacted MSC Computer Operations after receiving the message and before doing anything else.