I got the computer(refurbished HP Envy 27 AiO PC) from may grandad who claimed he got 2 and wanted me to have the second so I took it home and plugged it in and it said that windows installation cannot proceed and to restart the PC. I clicked ok and the same thing came up. I have never got in and when I asked my grandad whats wrong with it he said he turned it on once and it worked just fine and didn't do anything to it ( I believe him bc the second one came it first). But I don't know what's wrong and don't want to talk to cs. Please help.