June 2016: Not a hitch so far. Windows 7 Pro pre-installed, easy upgrade to WIndows 10 pro. Does not have a graphics card, but that could easily be added if I need it later. Lot of memory is good - 16G. No complaints, let's hope it stays that way.Update April 2017: still no issues, so I stand by my 5-star rating - great performance/price value. It seems some have have a no-boot situation because the PS switch is set to 240v, not 120v. If you have a DOA, check this first!