When I attempted to install Apple's Security Software Update the other
day, my G5 iMac running OS 10.4.11 Tiger wouldn't accept my
administrator's password. Attempting to switch to any of my other
accounts resulted in Login Password "Shake." "Caps Lock" key is not
engaged. Rebooting the computer fixes the problem for half-a-day or
so, but then the problem returns. Any ideas? Thanks in advance. Mike