Quote Originally Posted by tragos View Post
That's wierd, I had some trouble to re-update to 4.1 patch like 4-5 days ago so I used the second link to download the annihilus installer and worked perfectly. If there's something I can do let me know, add on Skype.
From what I see using the second link it only contains annihilus files and not the entire content of a diablo 2 folder, I could be wrong maybe I needed to restart my computer or something, but the "requires expansion disk" error never went away.

Maybe you moved that content into another diablo 2 folder with the necessary files?