Trigger Altiris Software Update Cycle on Remote a Computer

 When using Altiris you often find that some computers have a bunch of updates pending, but the users are always putting them off. The script below is what I have used to force an Altiris update cycle on a remote system:

#Update with a list of computers / IPs you want to update
$Computers = "computer1","computer2"
foreach($c in $Computers){
    # check if the computer is on before trying to install updates
    if(Test-Connection -ComputerName $c -Quiet){
        # execute remote update cycle
        psexec \\$c powershell.exe -Command "cd 'C:\Program Files\Altiris\Altiris Agent\Agents\PatchMgmtAgent'; ./aexpatchutil.exe /Xa /q"
    }
}

Note:

You will need to run the script as an administrator that has access to the remote system
You need to have pstools installed: https://learn.microsoft.com/en-us/sysinternals/downloads/pstools

You can also update the script above to run an inventory by using the /I flag. 
Check out the AexPatchUtil.exe command line switches here:
https://knowledge.broadcom.com/external/article/181828/aexpatchutilexe-command-line-options-and.html