Can only boot using windows boot manager, need help!

Ciatzo

Honorable
Sep 9, 2013
67
0
10,640
So guys i built a pc with a samsung 840 evo 120Gb ssd and a wd black caviar 1tb hdd, using a msi z87-g45 mobo.

I installed my os (windows 8.1 64 bit) on the ssd, and added the hdd as a second hard drive. Now when booting up with my ssd selected as first boot option i get an error message stating:
Reboot and select proper boot device or insert boot media in selected boot device and press a key.

It always does this, but when i boot with boot manager as first boot priority it just boots into windows no problem.

If anyone knows a fix please tell me.

Z87-g45
4770k
840 evo 120gb
Wd black caviar 1tb
Kingston hyper xmp beast 2x4Gb 2400mhz
Seasonic s12ii bronze 620w