Worked fine for two days, day three I get this screenshot at boot, hit F1 and login pin fails with 0x8009002dRun all windows updates, reboot. Same error.Ran F5 diagnostics and it found one error(screenshot provided)Ran file system scan using CmD SFC /scannowAnd it reported file system corruption and repair.Not sure this was properly certified in great working refurbished condition. Can not recommend seller.