I've had an PC with only an HDD for around 6 months now and I recently purchased a PCIe m.2 SSD and when I install it then turn on my PC it tries to boot from the SSD and not my HDD (which has my OS on it). I've tried going the Bios and changing the boot priority but it only shows the SSD as a boot option. But when I take the SSD out it boots perfectly fine even without going into the Bios. So I was wondering if anyone could help me solve this problem I'm having it would be much appreciated!!