Could not start the windows sharepoint services timer service on local computer. The service did not start due to a logon failure

I don't know if any of you have come across this, but it cause the Sharepoint wizard to fail during the upgrade process of the service pack. The problem turned out to be very simple. The Timer Job service was running under an account that had expired. To fix it, go to the service, click Log On, and make sure the account it uses is valid and not locked or disabled.