Error installation message on UNIX in Windows

I have been trying to install UNIX in my WINDOWS system but every time I attempt to do so, it always comes up with this error message.

Error:
This is the first time you've installed Cygwin 1.7.x. Please be advised that this is a major release. If you have not done so already, please check out the documentation at http://cygwin.com/ to see how the upgrade could potentially affect any existing Cygwin installation.
If this is the first time you've installed Cygwin on this system then you can ignore this message
Is there any possible chance that I may avoid getting this error?
How can I go about correcting it?
