I purchased this because it was a cheaper option, knowing it was refurbished.  HOWEVER, when the computer tower is standing up, the fan makes a noise as it taps against something inside.  If you lay it down flat, it makes a HORRENDOUS noise as the fan hits on something pretty hard.  The ONLY way the computer is happy and won't make noise is if you lay it flat, UPSIDE DOWN, rendering the disc drive useless (we need the drive, which is a reason we chose this computer).  Just seems like something they should have checked on before shipping it out, refurbished or not.