All 3 of the PC's work great. The only issue each one has is the power adapter they send me it underpowered and the CPU will only run at 0.79GHz. After contacting one of the sellers they resolved it by sending the 90W. I'm still waiting on power adapters for two more I recently bought. Fast little systems once you have the right adapter, and they run Windows 11. Note they won't upgrade to W11 unless the core speed is above 1GHz - so you need a larger adapter to get W11 installed.