First: is you installation English or do you have a non-English version of Windows? If you are using a non-English version you might need to look at the sticky in the Nuts n Bolts forum at DAZ on INI file problems. If you are using English WIndows, or if the sticky thread doesn't help, then try installing some older DAZ content (or simply create a blank DzInstall.ini file). I think the Aiko 3 installer has worked for some people. (By the way, if yu are running Poser 7 or later you don't need to install to the application folder, so choose DAZ Studio as the target application to skip the check for poser.exe if you want to use an external Runtime - which is a good idea with Windows 7, and the default location anyway in Poser 8 and later.)