When running msiexec to install, update or remove a certain product, you may want to prevent it from rebooting the system, or even prompt the user to reboot the system (e.g. if it’s a part of a larger installation or some other scripted operation).
Before Windows Installer 3.0, the only way to do it was setting the Windows Installer REBOOT property like this:
msiexec /i MyPackage.msi REBOOT=ReallySuppress
In Windows Installer 3.0, Microsoft added several command line switches which makes it more readable. So now the command looks like this:
msiexec /i MyPackage.msi /norestart
Much clearer, isn’t it?