I received the Dell Optiplex 7020 Tower Desktop PC, and the system was actually in pretty good condition as opposed to other re-furb systems that I have bought in the past.However; I noticed that the unit was loading Windows 10 fairly slowly, so I installed "Crystal Disk Info" and the 2-Terabyte Hitachi Hard Drive is reporting errors on the platter, and will obviously not be  reliable for long.!.  The Drive's initial run temperature  starts at 80 degrees and quickly escalates to  around 102+ degrees, and feels very HOT to the touch.Another issue - - - - - - I am unable to create a Backup Image of the Drive; no matter what I try, the system reports an error message.  The total Drive usage is around 120 Gigs, but will NOT backup onto a 500-GB, 1-Terabyte, or even my 4-Terabyte NAS Server..Don't ever expect a perfect refurbished system, Iv'e bought about 5 or 6 from amazon, and have various issues with every one of them.!.