We are aware of the slow download issues, please refer to our main thread for slow download issues. As an important call out, we’ve seen issues with slow downloads caused by security applications such as TotalAV, or potentially unwanted programs such as PremierOpinion or Privoxy. Please try temporarily uninstalling these applications and running a virus scan.
As this is on our classic technical forums intended for Blizzard legacy games such as Diablo II and we have a known thread about the slow download issue, closing this thread.