Hello Dark,
Thank you for the tip. I did reflash yesterday evening and disabled KEEP DMI DATA.
The message still appears during boot, however sometimes only AMD DATA CHANGE.... comes up, other times the full message comes up.
I did a few reboots after reflash, and the miserable situation with BSOD and "Start Repair" was not there. However, as I mentioned in my first post, this seems mainly to happen when starting from a "cold" pc, everything I did yesterday after reflash was from a "warm" pc - I will have to give this a couple of days, so I´ve had the opportunity to make a couple of "cold" starts.
Best Regards,
Anders