Asus P8H67-V AHCI Driver issues

Configuration

• Asus P8H67-V (Socket 1155)
• Intel Core I5-2500K
• Samsung 840 Pro SSD
• Samsung 850 Evo SSD
• Multiple WD Red (>=2TB)
• 2 x Zotac Geforce GTX 660
• BIOS set to AHCI for boot
• Boot devices for Setup:
  • Exteal DVD/BR Drive using a verified Win7_x64 Disc (worked on other machines including the current setup in IDE Mode)
  • Samsung USB Stick (128GB, 8GB Partition for Win10_x64)

Problemset

Have been ruing on the 850 Evo for a while using Elementary OS (debian). Tried to install Windows on 840 Pro from scratch (cleaned the 840 SSD).

Error message:

Load Driver

A required CD/DVD drive device driver is missing. If you have a driver floppy disk, CD, DVD, or USB flash drive, please insert it now.

Note: If the Windows installation media is in the CD/DVD drive, you can safely remove it for this step

This message appeared for Windows 10 and Windows 7 (both x64, previously there was Windows 7 x64 installed on the 840 SSD)

What I have tried so far:

Assuming that it has something to do with AHCI instead of IDE in SATA Mode inside BIOS Configuration I downloaded AHCI Drivers from Intel (Chipset Manufacturer) and ASUS (Motherboard Manufacturer) but non of them worked. The drivers were shown as applicable for the hardware (Win10 Setup) but I was still not able to continue the setup process.

Note:

• Switching back to IDE in BIOS is not an option.
• Installers boot like a charm as does elementaryOS

Question:

• Is there a possibility to determine which exact Driver is missing? The error message is not what I would call conclusive as it does not really state more than "It's not working, I don't know why".

• Is there something I missed? Any other drivers to try? Any preperation for the Samsung 840 needed I missed?