An operating system wasn't found

MrBlaBlaBla

Distinguished
Feb 2, 2014
10
0
18,510
So I recently changed my motherboard to an MSI Z270 Plus and when I turned on my pc it gave me the message "An Operating System wasn't found. Try disconnecting any drives that don't contain an operating system. Press ctrl+alt+del to restart"

once I do this and it restarts, I press f11 to open the bios booting option and then I pick to boot from my hdd, not my ssd which is the default one. By doing this, windows will start normally. The weird thing is that windows is installed on the SSD, not my HDD, so I don't know why it will start only if I pick the HDD

I also tried changing the order of the booting devices on the bios but even though the motherboard recognizes my hdd (since I can see it on the System Status window), it won't let me pick it on the order for the booting devices option since only the ssd appears on that window

I would really appreciate if you guys could help me, since even though when windows starts it works perfectly and there doesn't seem to be any damaged files neither on the ssd or the hdd, it certainly isn't normal that I have to manually boot windows every time I turn on the pc

I have Windows 10, my ssd is a 120gb Samsung 840 series and the hdd is a 1tb Seagate