Once there, input your Product name or number. You can look online for Recovery Media starting with the linked paged: You have to order these from HP they can not be downloaded. In some cases, you may be able to order a USB stick instead of disks. HP Recovery Media is a set of DVDs and a CD, or USB stick, that will erase the hard drive (removing all data, settings, and applications, reinstall the original OS, drivers, and some HP Utilities. If F11 does not work, then you would need to do the reset using HP Recovery Media. You should try pressing F11 while rebooting the PC to see if you can get into Recovery mode. You will have to do a total reset of the PC to get it working again. Having the machine shut down during Windows Updates is a really BAD thing to do - as it often leaves the machine in a corrupted state. Sorry, but I don't have very good news for you.