headbanger,

Double-check your switches for the installs (f.e. read the Tech Docs from Network Associates)..

New VirusScan
code:
$VScanLocation = "\\is\Software_Applications\McAfee\antivirus\vscan4.5"
RUN $VscanLocation+"\SETUP.EXE ADDLOCAL=ALL REMOVE=SendVirus REMOVEINCOMPATIBLESOFTWARE=True REBOOT=F /q /i"

Here is one that we used to update the Service Pack for McAfee:
code:
$VSCANSP1 = "\\IS\Software_Applications\McAfee\antivirus\vscan4.5Sp1"
RUN $VSCANSP1+"\VSC45SP1.exe /silent"

HTH,

Kent
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