Dear DosFreak,
Installing Windows Defender on Windows 2000, having edited the .msi in Orca and moved gdiplus.dll where it should, (and updated Windows Installer to 3.1), I got the following error when the installer was about to "Copy New Files" (meaning that launching the installer, vali[censored] and chosing setup options worked):
"The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2356."
Can you help?