Thxs GT500, I believe there is a problem with the task scheduler as you reported. After a reboot i found the following error message in the log file: " "Task Scheduler Service" Started at 20/02/2009 08:13:28 "Malwarebytes' Scheduled Update for Computer.job" (mbam.exe) 20/02/2009 09:00:00 ** ERROR ** The attempt to retrieve account information for the specified task failed; therefore, the task did not run. Either an error occurred, or no account information existed for the task. The specific error is: 0x8004130f: No account information could be found in the Task Scheduler security database for the task indicated. Will attempt to resolve this issue elsewhere as this is not MBAM's problem. Many thanks for the assist..