So this is a little funny, but I just got my Thinkpad X1 Carbon a few days ago with Fedora preinstalled. I booted it up to the Fedora installation, then the mac

So this is a little funny, but I just got my Thinkpad X1 Carbon a few days ago with Fedora preinstalled. I booted it up to the Fedora installation, then the machine rebooted. After it rebooted, a Windows loading screen appeared, followed by a pop-up DOS prompt that entered some commands, followed by another reboot into the Fedora installation. I haven't seen any evidence of Windows since, but that creeped me out. Can anyone explain what was going on, there? Also, of course, I had to completely wipe the hard drive and install my own version of Fedora to be totally comfortable after that.