Does Norton Security 2010 Block Window Updates?

Hello there, I'm new to Nortons and have only had it for a couple of weeks.

 

I have noticed that I get messages to update definitions in windows defender and once I do it just says that I'm upto date. I manually installed definitions which it did accept and now is uptodate.

 

Same thing with windows update, except I can't do it manually.

 

Is there a possibility that I have some sort of feature or exclusion turned on which could do this?

 

Thanks in advance, any suggestions would be helpfull.