software irks

Decided to be less masochistic with editing XML and decided to (finally) try out XMLSpy. The free version installable churns away (via InstallShield) and then in the end pops up a stupid dialogue back at me saying that " the system needs to be restarted in order to continue with the installation. Please click Restart to reboot the system". No way to politely indicate that I'd like to reboot later. Ugh!