Window transparency issue

[Vladesch]

I am trying to make my windows opaque, as I find the text difficult to read against most (semi) transparent backgrounds.
However, if I slide the "window transparency" around I can go from almost completely transparent to about p[artly transparent, which is still difficult to read.

I can remember back in the day I had no problem setting opaque windows, so perhaps this is some issue with the latest directx or something?

How do others do with this. Can you make your windows (chat specifically) completely opaque... ie black background?