Hi. I have a problem with the HP Pavilion 15-p055nc. I have it for about 2 days and it wanted me to install win10. The installation was successful, but windows10 has errors. The display does not dim and the OS does not understand the graphics. So I don't play anything and ntb is useless to me. I would like to load win7 into it, which I have on USB, but when I turn on boot in the bios, it wants to save it after me with the 9667 + enter key. Which, of course, I don't know how. Therefore, I also can't load win7 via boot. Thank you in advance for your advice.