You're flattering so much today! One reason I'm keeping guessing on NAV 2003 is that I don't have it on my PC. But, if you have 0x0409.ini in your original folder of NAV, you should find a line like this: /S /v/qn is the proper switch you use with setup.exe! So, I imagine you need it to be: setup.exe /s /v"/qn REBOOT=ReallySuppress" OR NAV.msi /qn REBOOT=ReallySuppress Other than that, you can check if those reg keys above are helpful, too. For NAV 2004 Pro, I might think in a solution for the problem you mentioned. THERE'S A WAY! But, time is limit!! I'll try, though.