Thanks to everyone. Everything runs great now... except for one thing.

To make a long story short, I'm running a McAfee update kix. The full install and virus update works beautifully; but the SP1 doesn't.

I think it has to do with the switch at the end. I tried to remove the switch (/silent) and it runs fine. But (of course) I don't want the user to be prompted and want it to be done silently. Does my syntax look right? Cuz with the 4.5.1 full install switch (/s) works fine.

Thanks for the help, this is driving me batty.

shell '%comspec% /c su "\\BOMREC1\PUBLIC\VIRUSU~1\McAffee\451\sp1\VSC451S1.EXE /silent" < pass.txt'
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God bless Opera. God bless netjak.