I can download the game, brand new computer and updated Java installed. I get the following error:
[18:22:07] [Client thread/INFO]: Setting user: J_for_Jjjjdddd
[18:22:07] [Client thread/INFO]: (Session ID is token:fc65c6248995453ea1bf5a1d9b96258b:c2b2d3e2183942a4a10abb6e88173b74)
[18:22:09] [Client thread/INFO]: LWJGL Version: 2.9.1
[18:22:09] [Client thread/INFO]: Reloading ResourceManager: Default
[18:22:10] [Sound Library Loader/INFO]: Starting up SoundSystem...
[18:22:10] [Thread-6/INFO]: Initializing LWJGL OpenAL
[18:22:10] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[18:22:11] [Thread-6/INFO]: OpenAL initialized.
[18:22:11] [Sound Library Loader/INFO]: Sound engine started
[18:22:12] [Client thread/INFO]: Created: 512x512 textures-atlas
[18:22:22] [Server thread/INFO]: Starting integrated minecraft server version 1.8.1
[18:22:22] [Server thread/INFO]: Generating keypair
[18:22:23] [Server thread/INFO]: Preparing start region for level 0
[18:22:24] [Server thread/INFO]: Preparing spawn area: 5%
[18:22:25] [Server thread/INFO]: Preparing spawn area: 11%
[18:22:26] [Server thread/INFO]: Preparing spawn area: 19%
[18:22:27] [Server thread/INFO]: Preparing spawn area: 29%
[18:22:28] [Server thread/INFO]: Preparing spawn area: 38%
[18:22:29] [Server thread/INFO]: Preparing spawn area: 49%
[18:22:30] [Server thread/INFO]: Preparing spawn area: 57%
[18:22:31] [Server thread/INFO]: Preparing spawn area: 69%
[18:22:32] [Server thread/INFO]: Preparing spawn area: 83%
[18:22:33] [Server thread/INFO]: Preparing spawn area: 99%
[18:22:33] [Server thread/INFO]: Changing view distance to 12, from 10
[18:22:33] [Server thread/INFO]: J_for_Jjjjdddd[local:E:2b106ce8] logged in with entity id 222 at (195.5, 72.0, 263.5)
[18:22:33] [Server thread/INFO]: J_for_Jjjjdddd joined the game
[18:22:38] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 4378ms behind, skipping 87 tick(s)