When playing Skyrim, I am now noticing a lag that was not present before. One example is when I first enter Helgen keep, Ralof kneel's beside the corpse of Gunjar and remains in that position for several minutes before standing up and speaking to my character. I have also noticed that on several occaisions when I go to fire an arrow, it takes upwards of 5 or 6 seconds for the arrow to actually leave the bow. What might be causing this anomaly? I am running very few mods, and only using the 3 Skyrim Hi-Res texture packs. I do have all of the available DLC for this game as well as all 4 of the "unofficial" game patches. Any ideas?