Mysterious Application Speed-Up

Just recently, a couple of my applications have been speeding up for no apparent cause. The only new things i’ve installed are a new hard drive and typing of the dead. The problems were present before i installed typing of the dead, so Could it be the hardrive? Windows Media Player and Media Player Classic sometimes goes into fast forward mode when i skip ahead, without actually going into fast forward mode as i can’t slow it down normally. Visual Boy Advance has uncontrollable speedups. Has anyone else had these problems before, and if so, how did you fix it?