Typically I research this stuff on my own but time is against me on this one so I'm throwing out the SOS here.

Situation:
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An application runs fine if a host is upgraded to SP2, however, crashes like a meteorite if the host comes preloaded with SP2.

Can anyone confirm
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Which files are left untouched when upgrading to SP2. I highly suspect that there must be a file(s) that are/is not upgraded during the process.

Any confirmed feedback on this would be much appreciated.

Thanks to all in advance.

--TH13