Tried a backpack for a week, and hated it. Uncomfortable, hot and sweaty. You lose a ton of heat through your back. Thankfully, the store took it back for a full refund. Only issue with a laptop is the constant vibration and jarring in a pannier. Significantly less risk of damaging a computer in a backpack. Sounds like a laptop that "weighs" 10 pounds could be obsolete, so the bumps may hasten its demise.