This is the first commercial built Desk Top computer I have owned since 1995. All other Desk Tops I have owned have been " Home Built".  I've built several for friends and " word of mouth " customers over the years. Individual computer parts have sky rocketed over the years. I completed the last upgrade on my Personal Desk Top in 2016. The motherboard was ten years old at the time. It had all the RAM that it would take 16gb, a great video card, a GForce 730 2gb. It was no slouch but I could do nothing else with it. I seen the Z440 on Amazon and was intrigued. I ordered it, it arrived on time and in perfect condition. The first thing I did was to install my Video card and start checking components to compare the ad to reality. It was all there ! It had Windows 10 Pro, My old one had Windows 7 pro. I had previously saved all my important documents, photos etc on an external drive. To make a long story short, II had no problems or glitches as reported by other reviews, no problems when getting Windows updates. This thing runs fast and clean and I couldn't be happier ! My hearing is not great but I can't even hear it run ! There is lots of room to upgrade and add to peripherals. I'm sure it will keep me happy for many years to come.