Error cannot load D2ex2.dll

[Icehammer]

A friend of mine is having the same issue, but the d2ex2.dll is in their Annihilus folder (and all the other d2ex2 files).
Any idea?
He's using windows XP, and get the full installer (the diablo 2 with 1.13d version + Annihilus Installer), and btw he's not using any antivirus.
@Game @acyroma

PS: Reinstalling several times, rebooting and poof! he gets in Annihilus now.

[Game]

A friend of mine is having the same issue, but the d2ex2.dll is in their Annihilus folder (and all the other d2ex2 files).
Any idea?
He's using windows XP, and get the full installer (the diablo 2 with 1.13d version + Annihilus Installer), and btw he's not using any antivirus.
@Game @acyroma

PS: Reinstalling several times, rebooting and poof! he gets in Annihilus now.

Literally impossible for this to work in Windows XP. He can probably get in-game, but he cannot use spec mode, he'll likely crash in a lot of areas, etc.