Hi MarcoBruti,
I am in a similar configuration as you and i encounter
exactly the same problems.
A temporary solution is to use the AppGameKit Player MikeMax made.
You uninstall the older version of AppGameKit Player on your Android
device before installing the new one.
After what you can test AppGameKit 1.08 with broadcasting.
Concerning AppGameKit compatibility with older PCs i think we are only 2
people with this compatibility problem so i dont think AGK
developpement team is going to make a special version for us 2...
And like you i am not going to buy a new laptop computer,
i would loose compatibility with a lot of stuff i use because
new windows version (vista, 7, 8...) are not compatible and it's
not easy to regress and buy a windows xp license actually to
install it on a new laptop.
I am not english so xcuse my syntax, grammary or anything else wich could occure some ununderstanding