When I first booted the PC I received, it gave me the error message in the attached photo. I called the tech support number and at first I could not get anyone to answer. It kept going to voicemail stating the would get back to me in 24-48 hours. When I finally got through to the seller's first tech support person, I could hardly hear her and the line was static sounding. I gave up and called back. When I got through to the second tech support person, the same issue happened again, I could not hear him either (I tried a different phone for each call). It then dawned on me that they were probably working from home. If you read the error message it appears that the seller pulled a jumper on the mother board allowing them to bypass the network administrator's password during reconditioning of this PC. However, the seller's second tech support person told me that this was not a hardware problem but was a windows problem. He said I needed to reinstall the entire Windows operating system to fix the problem. When I said this was not the problem, he said that I should ship the PC back to Amazon for a refund. Then he also asked whether or not I could just live with the problem because it only happened on boot up. He implied it was not a big deal and I would just get used to it over time. I talked to one of my computer tech support people at work and they told me to bring in the machine and they will fix it next week. One thing you should know is that I used to purchase $3 Million in computer hardware per year and I do know more than most buyers and will not accept this type of response. Because I need the machine for an immediate project starting Monday, I am keeping it, but have zero confidence that this vendor will support me if future problems occur.