I added the CD keys to my account today and downloaded the downloaders for both Diablo II and Lord of Destruction. When I run the installer it shows a 404 screen in the middle of the app, and tries to save the file “http_404_webOC” with no apparent extension. Once the downloaders have finished I run Installer.exe as administrator. It remains running in the background according to task manager, but they do not give me the option to install the game.
Hi,
Yeah – I don’t think the downloaders need that file but since they can’t find it on your system, they give you a warning. You can save it on your HD so that it doesn’t give you that warning if you ever need to download the installer again.
I didn’t have that problem when I ran the installers… make sure it’s not minimized or hidden behind another window. You should be seeing:
When you click on the Install button, you will get this agreement:
which you need to scroll through (and read 
) before the Agree button will become available.
The next screen is for your name and licence keys (one for D2 and another for D2 LoD):
Your licence keys are located in your BNet account info here: https://account.battle.net/games#classic-game-accounts
Is that really needed on your system ? I didn’t do that – I am an administrator on my PC.
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That article is for the modern Blizzard launcher.
The OP is trying to install legacy D2 which doesn’t use the launcher. The D2 clients use their own built in launcher.