Microsoft has been made aware of the issue which appears to be affecting all MSE and possible Defender on Windows 7 and prior for updates since the 19th of January. I expect that it will be fixed soon. If MSE is not alerting you, you don't need to do anything. If MSE is alerting that it is out of date and a search for updates does not yield an error, but also does not bring down any updates, you can manually update from here:
Seems its an ongoing issue at the moment with many not getting automatic updates. The updates are there if you manually download them, but dont appear on the update servers.
Alot wont know either as MSE doesnt nag you unless definitions are a week old
Edited by bobble_bob (Tue 22-Jan-13 15:34:48)