I'm using Indy 9 here with Delphi 2005, and recently installed the Delphi 2005 Update 3 patch. During the patch process, several files that I deleted came back, along with several registry entries. Afterwards, I was getting an error when trying to load a DataModule that had some Indy components on them telling me that Indy90 could not be loaded because it uses IdWinsock2, which was already loaded by dclIndyCore. I imagine this happened during the install of the update by copying registry entries from HKLM to HKCU.

To work around this, delete the following registry entries:

HKCU\Software\Borland\BDS\3.0\Known Assemblies\c:\program files\borland\bds\3.0\bin\dclIndyCore.bpl
HKCU\Software\Borland\BDS\3.0\Known Assemblies\c:\program files\borland\bds\3.0\bin\dclIndyProtocols.bpl