This was bought to replace a Linux machine that crashed, so one of the first things I did was put in a second 500 GB hard drive with Linux on it. It dual boots with Windows 10. I also added a video card, although I had to cut down the height of the bracket to make it fit. With those changes, I was able to carry on in Linux as usual and occasionally boot into Windows, which has the advantage of finally recognizing a Canon laser printer I'd gotten at a low price, only to find out Linux and Canon don't always get along. Since Windows is a virus/malware magnet and I don't plan to pay for antivirus protection, I'm sticking with Linux about 99% of the time.The machine arrived from Toronto in very good condition, looking basically new. Some reviews seem to indicate condition can be a crapshoot, but I must've gotten one from one of the good places. I've bought refurbished machines before, but this was my first online purchase of one. I bought mine nine months ago and it's been working well. I've had good experiences with HP machines both new and refurbished.