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[Hamster of Doom]

That´s strange... mg2:
That´s the first time, I hear, that re-installing a game causes so much trouble! :blink:
I just installed Diablo 1 on my PC (with Win XP). It works without a problem; it loads the patch and I can connect to the battle.net without any problems.

Which OS do you use? I figured out, that the game has some problems, if the compatibility-mode (win 95 or Win 98/Me) is activated. (atleast on my PC. Maybe you should try out the compatibility mode, if you haven´t tested it already.)

The following may seem to be silly questions, but often the most obvious things get overlooked :
When you are at the multiplayer-menue and you can choose the type of connection: Is the option "Battle.net" activated, before you try to connect?
Which Battle.net-Gateway is set? Try to connect to another gateway.


Well, at the moment that´s all I can think of. I would suggest, that you visit the blizzard-site and some Diablo-Fansites.
I only know german fansites; so I don´t think, these will help you. But I found something in the Diablo-FAQ at the Blizzard Support. Maybe THIS is helpfull.

Edit: CD-Key? Diablo1 has no CD-key. You can play both Singleplayer and Multiplayer without it.