Wireless keyboard and mouse were working fine until today; installed new batteries in both when they wouldn't work-says they are connected intermittently, but can't use either one-have tried to re-pair and nothing happens-codes not recognized-

i have been using my wireless keyboard and mouse with no probs until today-installed updates this morning-since I restarted have been unable to use either device-have tried everything Apple suggests to do- re-pairing unsuccessfully; turned everything off and back on-sometimes the Bluetooth says it is connected, othertimes not-but even when it says it is connected the keyboard/mouse don't work; put in new batteries-no go also; bluetooth icon is on. Anyone have any ideas????