Hey when im downloading the program and its done downdloading the setup. I just start the setup and wait for it to be done but when it´s finish my computer says that i need to find a app to could open infinity
Close that message and open infinity from the shortcut that is automatically created.
But it dosen´t make a short cut for the app
Try to re-download/install INFINITY from this link.
https://s3.amazonaws.com/wemod/infinity/releases/master/Infinity-Setup.exe
Disable any Firewall/AntiVirus on your PC, since they can sometimes block the install/setup process. Use a different WEB browser, if need be.
Thanks i have it downloaded now 

So, can you easily launch and start the INFINITY app now ?