We have installed BPC 7.5 SP06 for NW on the Windows 2008 R2 server.
It has all the necessary pre-requisites(Xcedzip 6.5, Anti-cross 3.1, IIS 6.0, .Net 3.5) installed and configured.
During the last but one screen (before finish screen), I got a Windows Package Manager Popup saying "Operation failed with 0x80070008. An attempt was made to load a program with an incorrect format".
Not sure if this is any bug with SP06 or some pre-requisite is missing in the system.
Please suggest and let's know if you need anything else.