My high performance HP Pro Book OS failed after 12 years, and all my backup operating systems had problems of one sort or other trying to reload it; so it was time to replace it with a new OS and cheaper just to buy a refurbished PC that came with its own OS. My needs have changed since I retired from intense programming to office applications. For me, getting this refurbished Certified Dell Optiplex 9010 was a great alternative to buying an expensive new leading edge computer for big bucks. It is a relatively good performance computer for my basically light office and internet needs (spreadsheets, email, surfing web sites, Amazon, etc.). Was relatively easy to set up per sellers procedures.I have had it about a year now, it has held up great and has, in my estimation, already given back more than the low price I paid for it. Glad I didn't pay 3 times as much for a comparable new PC.