"Question
I can't see Text or I see Scrambled Text on the Splash Screen - what should I do?
Answer
This problem usually happens when you just install your operating system and haven't installed the operating system updates including DirectX 9.0c
It can also happen if you haven't installed the latest Motherboard and Video Drivers for your system.
Please contact Microsoft to update your operating system:
Microsoft Update for all Operating Systems
and contact your motherboard and graphics card manufacturer for the latest drivers and for installation instructions."
That's from Steam support. Is there no way to install drivers into Crossover?