PC requires me to choose boot device to load Windows 10

Issue been driving me nuts for a while now.

I'm not sure when exactly this started but I believe it first started when I upgraded to Windows 10 rc a few years ago. If I start my PC it eventually stops with a bios /bootup message "Reboot & Select Proper Boot Device or insert boot media in selected boot device." I have two hard drives in my pc.

To boot into windows, during boot I press F12 to get the boot menu to pop-up where I can then select the device (p1 - WDC) and it boots fine.

Some info ---> Looking in Windows under Disk Management:

1. Harddrive - ST325 Disk 0: two partitions. First is some small 24mb allocated and then a second partition D: (page file, archive primary partition)

2. Harddrive -

Disk 1: Four partitions. first is 14gb recovery partition. Second, 100mb System Reserved (system, active, primary partition). Third C: (boot, crash dump, primary partition). Windows is on this partition. Fourth D:logical drive storing files

If I look in the BIOS disk drive hard drive priority I have P1. WPC P2. ST 325.

So why if I choose P1 WPC from the boot menu it loads windows but if I let it boot by itself where it should be loading the same WPC it won't load windows?

Recent Questions...