I've been having a frustrating connection lately.  My internet takes a little bit longer than usual to load, along with all my internet requiring applications.  
I can play aces high online, but I warp constantly.  (no frame-rate drop)  
This all started after I attempted to open my NAT so that my 360 could work better online...  after that the internet stopped, but everybody in the house's internet (laptops) worked perfectly fine.  I connected wireless, undid all my ports, and then everything worked okay.  
Then I tried to open up my ports again in a different way... however, the internet didn't stop, it just became dead slow.  Later that day it sped up (after I disconected from wireless) but still not that fast...  I undid the ports (or so I think) and it didnt change anything.  
Plus, on a side note, my computer takes 30 minutes to shut down once it reaches the "shutting down" screen.  
ANY ideas on what could be going on?