I installed Ubuntu in a separate partition, along side Windows 8.1. However, Ubuntu/Grub does not appear in the Boot Loader. When I hold shift at startup, the regular Boot Loader (the one before I installed Ubuntu) appears with only Windows 8.1 as a boot option. I already tried the the Boot Repair from a Live USB, but nothing has changed.

I have two partitions, one is a journaling file system (mounted on /) and the other is the swap. I read that it may be because Windows doesn't recognize the file system, but I don't know what to do about it.

I don't know what I did wrong. Did I mount it in the wrong place? Any help would be appreciated.

(If the problem is stupid, I apologize. I'm completely new to installing Ubuntu, and I could not find very detailed instructions.)

Edit: In case this has any relevance, safe boot IS disabled.