This laptop comes with microsoft 10-S installed. I called HP and they said they would remove 10-S and install windows 10 for $75 ! HP support is worse than Awful, this was even after contacting second level support ! I switched out 10-S myself with following instruction from the internet. 10-S sucks, it turns your laptop into a lousy cellphone with APPs only from microsoft! If you want a Google Chrome browser, or Firefox one, forget it as the microsoft "store" will not sell it to you !!!! other that that fiasco the laptop boots up in 15 seconds, but you MUST enter a password to allow the Windows software to start, another annoying feature. And also remember to read the small print, as this el-cheepo has NO optical drive, so good luck loading your CD roms software. You will get stuck buying a CD r/w drive, so at least buy one using the USB-3 port, so it doesn't take all day to load your software.