McAfee VIRUSSCAN 5.1 Getting Started Manual page 17

If your computer runs Windows NT Workstation v4.0 or Windows 2000
Professional, Setup will remove the previous VirusScan version, but will
not preserve any previous VShield scanner settings.
6. Select Preserve On Access Settings, if the option is available, then click
Next> to continue.
If Setup finds incompatible software, it will display the Incompatible
software panel wizard panel that gives you the option to remove the
conflicting software.
If you have no incompatible software on your system and your computer
runs Windows 95 or Windows 98, skip to Step 9 on page 19 to continue
with the installation. If you have no incompatible software and your
system runs Windows NT Workstation v4.0 or Windows 2000
Professional, skip to Step 8 on page 18 to continue. Otherwise, continue
with Step 7.
Figure 2-3. Incompatible software panel
7. Select the checkbox shown, then click Next>. Setup will start the
uninstallation utility that the conflicting software normally uses, and
allow it to remove the software. The uninstallation utility might tell you
that you need to restart your computer to completely remove the other
software. You do not need to do so to continue with your VirusScan
installation—so long as the other software is not active, Setup can
continue without conflicts.
Installing VirusScan Software
Getting Started Guide 17