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PreScan
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How to Use McAfee Prescan
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1997-12-12
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Prescan for Macintosh
Copyright 1994-1998 by McAfee Associates, Inc.
All Rights Reserved.
Using Prescan
The CD-ROM and floppy disk versions of VirusScan come
with a Prescan, a utility you can use to check your
system before you install VirusScan. You can also
download this file from the McAfee website. If you
suspect that your computer system already has a virus
infection, you should run Prescan before you continue
with installation.
Follow these steps:
1. Shut down your computer, then wait for five
seconds before turning it on again. Do not restart
or reset your computer, as viruses can remain
active in memory through a brief power loss.
2. When you turn your computer on again, disable
your system extensions by pressing shift on your
keyboard until you see the message "Welcome to
Macintosh. Extensions Disabled."
3. If your copy of VirusScan comes on CD-ROM, insert
the disc into your drive. If VirusScan comes on
floppy disks, verify that the disk that contains
Prescan is locked, then insert it into your floppy
drive. If you downloaded the Prescan files from the
McAfee website, convert the files from .hqx to
binary format, then extract them to a clean, newly
formatted floppy disk. Next, lock the disk, then
insert it into your floppy drive.
Note:locked floppy disk shows two holes near
the edge of the disk opposite the metal shutter.
If you don't see two holes, look for a plastic
sliding tab at one of the disk corners, then
slide the tab until it locks in an open position.
Because no software can save to a locked disk,
viruses cannot infect files stored on one.
4. Locate the VirusScan Prescan program icon on your
CD-ROM or floppy disk, then double-click it to start.
Prescan loads the virus definition files included on
the disk and readies itself to begin scanning.
Note: Do not copy the contents of the Prescan
folder from your CD-ROM or floppy disk onto
your hard diskùdoing so exposes the Prescan
application to potential virus infection.
5. Click Scan to examine your hard disk for viruses.
Click Clean to remove any virus infections present
on your hard disk.
6. Choose the network or local hard disk volume, the
folder, or the file that you want to scan from the
directory dialog box that appears. Next, click the
Scan button or the Clean button at the bottom of
the dialog box.
VirusScan immediately examines the volume you have
chosen and reports its progress in PrescanÆs main
window. You can start consecutive scan or clean
operations by repeating Steps 5 and 6 as Prescan
examines your disk. When Prescan finishes its scan,
it reports its results in the main window.
7. Quit the application, then drag the Prescan floppy
disk icon to the Trash to eject it.
Note: If your computer continues to display
the same symptoms it did before you scanned
your hard disk, your problem might not be the
result of a virus. See "Other Sources of System
Problems" on page 44 of the VirusScan User's
Guide for details.