I purchased this Dell Optiplex 755 unit while I was taking college courses online. Not a legit version of Windows at all. It was torrented I believe. I’ve had this since August 2018, and since I’ve had a hard drive failure, and the CPU battery has died in less than a year. Machine was slow since I unboxed it. Stuck with Inaccessible Boot Device error, had to reset the computer to factory thinking something corrupted with windows and did a fresh install and I’m still getting errors. It would cost me more to get better ram, a new hard drive, and CPU battery than to buy this computer. I lost ALL of my data since the hard drive has failed. Wish I didn’t get this mad a year later otherwise I would’ve requested a refund or scrapped this piece of junk earlier.