I don't think the .NET framework was available for 7.1, so it won't work for that version. You need at least 8.0 and you have to have .NET installed on your system.
Actually, that's not true. You can use .NET with 7.1. However, if you're using .NET 2.0 you should be using 7.1.1f2, as that version fixed some issues with .NET 2.0.