Windows cannot find the Microsoft Software License Agreement

I ran into an issue when trying to install a Windows 8.1 eval client on my Client Hyper-V.

After booting up and pressing a key to start installation from CD/DVD I could select my regional settings, but I hit a wall when I press the "Install now" button:

My solution: Assign more than 512MB startup RAM.

According to System requirements for Windows 8.1
You need 1024 MB for a 32-bit and 2048 for 64-bit installation to run Windows 8.1

I first created a VM with only 512 MB as startup RAM and checked for "Enable dynamic memory". But I had to assign 1024 MB RAM as startup RAM to be able to kick off the setup.