If your pc stutters one solution is to defragment your disk. For some reason I disabled the defragmentation on my PC and after about a year the PC started to stutter. This included multiple audio and video players.
You can defragment you disk with this free software http://www.iobit.com/iobitsmartdefrag.html
Make sure that when you defragment your disk you choose „Defragment and prioritize files (slow)”. You will also have to enable „Boot Time Defrag” and reboot the PC. On reboot your PC should start a small defrag task. After that your PC should not stutter anymore.