You can use the tools and steps described in this blog post to see if you can find any Visual Studio products installed that are not appearing in Add/Remove Programs. Thanks!

XNA Game Studio does not integrate with Visual Basic Express Edition at all.  There is a forum specifically focused on Visual Studio Express Edition installation issues that would probably be a better place for you to post this question.  You can find it at http://social.msdn.microsoft.com/Forums/en-US/Vsexpressinstall/threads. It sounds like ...

[quote user="RobbosToYou"]Hereby my request for future XNA versions: better installing methods [/quote] We did work starting in XNA Game Studio 3.0 to make the deployment/setup creation tools available by default in Visual Studio 2008 (ClickOnce and setup/deployment projects) work for XNA Game Studio games like they do for all other ...

It could be a corrupted file, but if you've re-downloaded a few times already, it is likely that this isn't the problem.  There are also a few known issues that can cause bootstrapper.exe to crash on some systems.  The steps in this blog post can help you avoid the crash and get XNA Game Studio installed. Also, if you're able to, ...

Can you please zip your setup log files, upload them to a file server (such as http://skydrive.live.com/), and then reply here with a link so we can download them and take a further look?  You can find XNA Game Studio 3.1 setup log files at %temp%\XNA Game Studio 3.1 Setup\Logs. Also, if you'd like, you can report a bug about the ...

What is the exact error you get when trying to download the installer?  Do you see errors while trying to download any other components from the Microsoft Download Center? Also, if you continue to get a bootstrapper.exe error, you can use steps like the ones in this blog post to bypass the bootstrapper and install the individual pieces of XNA ...

[quote user="test84"]A) Why XNA Redist 3.1 doesn't have support for XNA 3.0?! [/quote] There is already a separate redistributable for 3.0, and all versions of the XNA Framework Redistributable are designed to install and co-exist side-by-side on the same computer, to be serviced independently if needed, etc.  A game can only ...

[quote user="test84"]When I select my solution in Project Explorer, on the properties it says XNA Framework Version : v3.0 [/quote] This means that your game is targeting 3.0, not 3.1  If you have your project configured that way, you will need to install the XNA Framework Redistributable 3.0 on users' systems in order to run ...

[quote user="test84"]They have XNA Redist 3.1 (by project says I'm using XNA 3.0 but I remember updating to 3.1). [/quote] Where in your project does it say that you're using XNA 3.0?  Have you tried installing the XNA Framework Redistributable 3.0 on your users' systems yet just in case? Do you have a copy of your ...

[quote user="RobbosToYou"]That begs the question: Why? [/quote] Games for Windows - LIVE integration in XNA Game Studio is currently only intended for developers to use while they test multi-player versions of their games.  You can use it as one of the clients of your game so that you don't need multiple Xbox 360s to test your ...