Problem Details:
when you are installing the osu tells me that there is a connection failure and I have left a long time but I get the same message







osu! version: 20150305

Make sure that your firewall or antivirus are not blocking osu!. Disable them and try again. If it's still not working, probably you can't connect to the server because of a routing issue.

Also, just in case, make sure that you are using the installer that you can here. You could try with the offline installer too (The small and grey button).