I'm using the RunOnceEx method to install all of the "Type 2" Hotfixes, all of them installs correctly except for KB832483 which pops the reboot requester at the end even though I used the correct command line parameters (/C:"dahotfix /q /n" /q) which should disable this. Because it's running from RunOnceEx I also added the backslashes to the command line. Here's the line in question, what am I missing here? REG ADD %KEY%\025 /V 1 /D "%systemdrive%\install\Q832483.EXE /C:\"dahotfix.exe /q /n\" /q" /f TIA