Bought my 2011 Mini in Nov 2011. Moved Stock 500gb HDD to secondary and installed SSD as main. on the Stock HDD, the last few days at random times if I am watching a video (any video) with MplayerX or VLC the video will freeze every few seconds. Once it starts it doesn't stop. When I reboot or bring computer out of sleep mode it will work fine for 10-15 minutes before the problem starts happening again. Had a similar problem when I was downloading a video to the same drive and playing a video. If I stopped the video from downloading the playing video would not freeze. Any thoughts on if it could be the HDD having problems or potential problems? I ran verify, and Disk Warrior and found nothing wrong.