Some tools required from Windows Installer 4.5 SDK ORCA.msi msifiler.exe Eset Antivirus install package eavbe_nt32_enu.msi with No Modules. The size is 6.42Mb. I receive a "Program component upgrade" message for version 3.0.695, what should I do? (3.0) I get this one by using the update program components in Advanced update setup of my previous installed version 3.0.684. The latest virus signature database updates: LOADER0 em000_32_l0.nup PERSEUS0 em001_32_l0.nup PERSEUS1 em001_32_l1.nup PERSEUS2 em001_32_l2.nup ENGINE0 em002_32_l0.nup ENGINE1 em002_32_l1.nup ENGINE2 em002_32_l2.nup ARCHIVES0 em003_32_l0.nup ARCHIVES1 em003_32_l1.nup ARCHIVES2 em003_32_l2.nup ADVHEUR0 em004_32_l0.nup ADVHEUR1 em004_32_l1.nup ADVHEUR2 em004_32_l2.nup CLEANER0 em005_32_l0.nup CLEANER1 em005_32_l1.nup CLEANER2 em005_32_l2.nup ANTISTEALTH0 em006_32_l0.nup ANTISTEALTH1 em006_32_l1.nup ANTISTEALTH2 em006_32_l2.nup Optional but recommended to avoid a small download on first update check SYSTEMSTATUS0 em009_32_l0.nup SELFDEFENSE0 em013_32_l1.nup SELFDEFENSE1 em013_32_l2.nup SELFDEFENSE2 em013_32_l3.nup Install ORCA. Open package eavbe_nt32_enu.msi Delete row Property="NoModules" with Value="1" and save changes. Silent Install script: @echo off&SETLOCAL ENABLEEXTENSIONS ::# create folder md "%AllUsersProfile%\Application Data\ESET\ESET NOD32 Antivirus\Updfiles" ::# create TARGET_DIR md %Temp%\NODInst ::# MSI-based installer package administrative install msiexec /a eavbe_nt32_enu.msi /qb TARGETDIR=%Temp%\NODInst ::# XML configuration file copy /Y cfg.xml %Temp%\NODInst ::# push latest updates copy /Y /V Updfiles\em00?_32_l?.nup %Temp%\NODInst\APPDATADIR\Updfiles ::# populates the File table with sizes based upon source directory msifiler -d %Temp%\NODInst\eavbe_nt32_enu.msi -v -s %Temp%\NODInst\APPDATADIR\Updfiles\ copy /Y /V Updfiles\em009_32_l?.nup "%AllUsersProfile%\Application Data\ESET\ESET NOD32 Antivirus\Updfiles" copy /Y /V Updfiles\em013_32_l?.nup "%AllUsersProfile%\Application Data\ESET\ESET NOD32 Antivirus\Updfiles" ::# Launch install pushd %Temp%\NODInst start /wait callmsi /i eavbe_nt32_enu.msi /qb- REBOOT=ReallySuppress popd rd /S/Q %Temp%\NODInst >NUL 2>&1 Adjust the path of executable and msi package. In my script, all files are stored in same folder and updates are in Updfiles folder Q: Why using the version 3. Eset just released the new 4.2 A: I just need an antivirus installed to make Windows Security Center happy. My VPN connection to the company i'm working for requires Antivirus enabled and up to date + firewall enabled and some other security settings activated. Q: Can i use the full installer (25.9MB) with Modules included A: Yes. In that case, no need to edit package eavbe_nt32_enu.msi with ORCA Using the package with no modules help to save some space - 6.42Mb vs 25.9Mb - where sources are stored.