Happened to me too once. I believe the reason was because with the new mobo, the computer thought the date was like year 2000. But anyway, as long as it isn't a hard drive you are replacing, then there shouldn't be any trouble, just remember to install the drivers for the new mobo and don't forget to remove the old drives. I believe CCleaner could be used for that. I'm sure there are other programs, but it's the first one that springs to mind.