I bought this to replace a 32 bit Lenovo desktop running Windows 7.  Just as I was finishing adding software and transferring all of my data, the display started giving trouble.  Then, it stopped working completely.  Black screen on the monitor with VGA and DP adaptor for HDMI.  I even tried installing a video card without success.  It was a big mistake, and it is out of the 90 day warranty, so a waste of the purchase price.