Inspiron N5110 replaced optical drive with SSD, UEFI can't boot

So I've finally managed to find someone to replace my optical drive with an SSD (wouldn't want to void the warranty, do we?) and I've got quite bit of a problem here. After installing Windows 8 on the SSD, I get the error "winload.exe missing or corrupted" and error code 0xc000000e. The installer automatically put the boot data on the original HDD, while the OS is on the SSD - and it seems the UEFI can't find the OS like this.

The OS itself seems to be intact, since pressing F12 at booting and selecting Hard Drive starts the computer normally.

I've tried to move the boot sector to the SSD, but it seems I'm missing something... Would a BIOS update maybe help with this? Or any other constructive idea?