Ironi,

Thanks, I'll try to see how that matches up with my eeprom later today. I do see one thing different; my eeprom has some of the bytes near the end filled in (non-ff values), But as I only looked at it after the M$ "update", that could well be something that M$ did too.

I'm still trying to get a hard and fast confirmation that M$ security updates change these values. Interested in sacrificing one of your cards for the cause (since you now have the original settings you should be able to reset them if need be)? If you're running XP then I would suggest just taking all updates and see if the eeprom is changed. If Win98 then Striker2002 posted a link to the update that he thinks is at least one source of the problem in the 4th message in this topic.