hp computer window operation system could not start up,

Derek December 17, 2016 at 14:10:07

Our role on here is to help folk with their computer problems by giving advice based on what you tell us. The helpers are volunteers who do so in their free time without charge. We don't provide keys, software or hardware. You can still upgrade to Windows 10 for free as far as I know, like this: http://www.howtogeek.com/272201/all... Always pop back and let us know the outcome - thanks message edited by Derek

riider December 17, 2016 at 18:58:56

We can't tell you how to repair your computer without knowing the exact model & model number. HP has made a LOT of different models over the years.