I tried fixing this by setting the services to run as administrator. After changing this and rebooting, the services won't start due to "Circular dependency: The avast! iAVS4 Control Service service depends on a service in a group which starts later", and "The avast! Antivirus service was unable to log on as mydomain\administrator with the currently configured password due to the following error: An attempt was made to logon, but the network logon service was not started."
Help?