About 1 month ago, my old computer (that came with Win 98 installed) finally broke, and I decided to replace it with a refurbished computer. I had upgraded the old Win 98 computer to WinXP, and then to Win 7. I enjoyed working with Win 7, and decided to continue using it. I had tried 'Win 10 to go' a number of times on different computers, but it confused me. I guess I'm too old (90 next year) to waste my time learning to use a system I don't like.I researched the internet for a refurbished computer with usb3 ports, and Win 7 installed. I found a reasonably priced desktop HP computer at Amazon, with usb3, a 512GB SSD hard drive, but with Win 10 installed. I'd installed operating systems many times, so it wasn't a big deal. The price was right. I purchased an OEM edition of Win 7 Pro, and then ordered the refurbished HP desktop, with Win 10 from Amazon. I ordered it on Thursday, and it was on my doorstep Monday. I quickly set it up, and couldn't wait to try it out. The Win10 OS ran quickly, but I still didn't like it. I then tried to replace Win 10 with Win7, but ran into problems. I wrote the refurbisher (Stallion Tek) through Amazon about my problem with replacing the Win10 OS with Win7. I received a quick reply from Stallion Tek, essentially saying that now that they know what I'm trying to do they can help me, the BIOS was wrong for Win7, and they would change the BIOS and install Win7 Pro. They sent me a free return shipping label. My contact said they'd start making changes to a computer immediately, and by the time they received my return, the new computer would be ready to go. They were true to their word.The new computer, with win 7 installed, worked great, but the rear usb3 plugs didn't work, and the case was jammed closed. I couldn't check if the usb3 cable came unplugged. Apparently the computer was damaged in shipping. The note I received from Stallion Tek said that they would immediately update a new computer and ship it to me. Then after I receive it and check it out......then return the damaged computer to them (free shipping). I'm using the new computer, and everything works as it should. Receiving, and trying the equipment before returning the damaged equipment is a new experience to me.Although, I returned equipment to Stallion Tek twice, it was not their fault. They went out of their way to help me, and I highly recommend them.