I just recently started getting this message. Whenever I get it, if I just simply shut my computer off and start it right after it usually boots up like normal. I can't figure out what is going on. I've tried taking my computer apart and making sure my SATA drive is plugged in properly. I went into my BIOS and it says my SATA drive is first on boot. I went into my BIOS and one time it showed my external hard drive as the first boot, and SATA on the second, however when I unplugged my external it still went to the Reboot and Select Proper boot device screen. I checked my BIOS a few times so far and my SATA has showed up on the list as first every time except for that one time where my external was on it. I was hoping someone could suggest something to me to fix this issue. I don't want to have to keep restarting my computer to get it to boot right. I thought maybe I should try going to a restore point from a few weeks ago. Thought maybe an update may have messed something up.
Hook up your external, go into bios and remove it from list of bootable devices sequence, it may be shown as USB.
I normally have mine set as hdd, dvd and then usb.
If I want to boot of the dvd or usb, I use the boot menu option during post, normally F8 or F10.
Well I normally leave my external plugged in all the time and when I go into my BIOS it doesn't even show up. It has only showed up one time when my computer tried to boot from it. It's very strange and frustrating what is going on.