DD/Unity stopped working

So I fired up the computer to check out the daily today, and after the loading the login screen came up all garbled. The fields looked pink, the characters were unlegible, when I selected an input field (e-mail or password) it lit up white, so I tried to enter my credentials, but then it just turned black. So I couldn't fire it up.
I reinstalled the Unity player, but now I'm getting a Unity error message before even loading anything (it says, Unity couldn't update, I can try a manual installation but it doesn't change anything, I get the same error again).
I tried also the non-test version and I get the same thing.
I'm not sure if it's a DD issue or a Unity issue or just somewhing with my computer; though weird thing is, I did not change anything on my system, didn't install anything, and yesterday it was working fine, today it's gone...
Ideas very welcome, ideally still before midnight!
I reinstalled the Unity player, but now I'm getting a Unity error message before even loading anything (it says, Unity couldn't update, I can try a manual installation but it doesn't change anything, I get the same error again).
I tried also the non-test version and I get the same thing.
I'm not sure if it's a DD issue or a Unity issue or just somewhing with my computer; though weird thing is, I did not change anything on my system, didn't install anything, and yesterday it was working fine, today it's gone...
Ideas very welcome, ideally still before midnight!
