Ok, so I had Tome 2 error as well, I went to my account page and re-downloaded the installer, but this time its not installing all the game files onto my PC, this time it installed the D3install set up, Now I'm installing the game and I'm at 15%.

You should try this also, maybe it will work for you.

at 25% now, seems to be going smooth, its downloading and installing so fast, doesn't seem like a lot of people are using the servers atm.
Edited by Deathsmethod#1122 on 5/14/2012 8:35 AM PDT