"There was an error writing to your hard drive while trying to download a file from battle.net. You may need to free some space. Please check your hard drive and try again."-----That is the error when i click the battle.net button. I have cleaned a few games off my Hard drive and it still wont run i have uninstalled and reinstalled a few times to no improvement. My brother is having the same problem. We both purchased the Battle Chest a few weeks ago and only let us log in once to Battle.net then it gave us the error and i cannot find anything on the forums to fix it. Any help would be greatly appreciated. We only purchased the game so we could play together.

Hi, Dacrit42

Are you on Vista? If so, try right-clicking on the WC3 icon and choosing "Run as Administrator."