Normally my computer will use 1GB - 1.5GB on idle, then when I play a game like World of Warcraft it will go up to around 2.5 - 3.0 and when it closes it comes back down. The past 2 days it hasn't come back down after playing. If i restart it resets but comes back. I tried seeing if maybe it was happening because of a certain amount of time that had past so I restarted my computer, logged in, and just watched a movie or two to see if it still did it and it was at around 80% being used before the end of the 2nd movie.
The only thing i can think of that i installed recently is the Diablo III beta.
Any help is appreciated. Thanks.