Question

how can we convert windows 7 to windows 9 from HP

Answer 1

You should to do 1st format the c drive then u can Change your Operating system what u want okay??

By your Bios setup..

Answer 2

You have to format the computer firstly u have to buy windows 10 cd from shops or take it from any of your friends then after insert the cd into drive the menu box apear click on format then after click on next...next and install ur pc will be updated to windows 10