Hello just wanted to post this here because we found a solution after some work on it and didn't find any documentation online: I hope this helps someone else to save time :) we were having the error 0X80074284 when launching a Task Sequence from SCCM O.S. Deployment bootable media, this error was unreferenced in our KB so we serached any documentation online without any result. After a long search we noticed that one colleague changed a package that was referenced in the TS without the usual "Update package" procedure from SCCM console, but directly putting a patch file into the "Updates" folder of our Office 2010 Installation package. After removing the patch and correctly injecting it into the package from the updates source folder and releasing a new version to distribution points the error 0X80074284 was solved so the cause may be an unexpected mismatch in the package files.

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