I am having a problem in my system that I am not able to install NextInstaller in Windows 7. Whenever I try to install the software, I get an error saying "This setup is not for this operating system". It worked fine in many of my friends systems that had operating systems like Windows XP and Windows Vista too. I cannot understand why this problem is occurring in Windows 7. may be this is an incompatibility issue. Kindly help me with your suggestions and solutions as soon as possible.