Many software installers (including far too many game installers) write
poorly handled version checks that block on future versions of Windows. Most
of the time, they work perfectly fine on newer versions of Windows if they
didn't do this kind of thing.

Try turning on the "Windows XP SP2" compatabiltiy mode for the installer and
that should get it to stop blocking it. Of course, YMMV after that depending
on other potential problems with the game.

Create a short-cut to the installer

Edit the properties of the shorcut

Go to the Compatibility panel

Turn on "Run this program in compatablity mode for:" and leave the list as
"Windows XP (Service Pack 2)".

For the installer to work, you may have to also turn on "Run this program as
an administrator" as well.

--
Chuck Walbourn
SDE, XNA Developer Connection

This posting is provided "AS IS" with no warranties, and confers no rights.