This one should be _real_ easy! Two days ago, my hard drive on my (now) discarded computer gave up the ghost. After consideration, and advice from friends, I went out to Staples and bought a Dell, with <sob> Windoze installed. I hooked up everything and Windoze boots OK, my sound works, etc.
This morning I installed Jessie, and this time the install went well. I could put in partitions for / , /usr/, /boot, /var, /tmp, and put in a big swap partition. When I rebooted at the end of the install, I got my Windows again, which pleased me, since I'd left it in, giving it 50 gig of my terabyte drive. But I don't know how to get my new Jessie to boot! Back when I had one of my first Linuxes and MS-DOS on my system, one got a prompt: "L or M" as soon as one turned on the computer. Things are now more subtle I'm sure, and they are too subtle for me! So can someone who also has a dual-bootable system(with Windows 10 and Jessie) please tell me how you choose, at boot-time, which of your systems you wish to boot? TIA Alan McConnell