Sorry, my first post at a forum ALWAYS has to be a noob question

Well I got the PC yesterday, built everything together, and I love how fast it is (getting 60 FPS in Shatt non stop is sexy, my old PC was a slower AMD running at 2.2 GHz, single core, GeForce 6200 vid card... ), but I think it's running a bit hot.

After running 4x windows (I can't seem to get a 5th trial account, keeps giving me an error message when trying to create) for about an hour, all of the cores are running at 45+ degrees (while typing this the first core hit 50 degrees, I shut down all WoW windows after that). After being left idle all night, I wake up and it's still running at 35 degrees. Is this normal? I mean it's not even overclocked yet, still running at the factory 2.4 GHz.

I'm using an Artic Cooler 7 CPU fan: http://www.newegg.com/Product/Produc...82E16835186134
And Artic Silver Ceramique thermal paste: http://www.newegg.com/Product/Produc...82E16835100009

I'm fairly sure the paste was installed correctly, is there anything else I can do to cool it down?