I have the same problem after deleting everything to get rid of the epic fail that is Mavericks. I have restored the system to Mountain Lion. I am currently in the middle of a backup and cannot do a restart. Does Apple provide any solution for any problem that does not require a reset or reboot?
i get tis error after downgrading from mavericks. for now im really confused. as a fresh user of mac. system is really buggy, much more than ms windows. sorry but if its normal for this sys then im out.