Windows text too light

One big issue for me in Win7 after XP is that text in browser windows (like in IE9, Firefox and Thunderbird) lacks contrast - it's a pale grey rather than the black I had in the same apps in XP. Actually this text is pale grey as I type it.

This seems to be "global" and no amount of fiddling in the apps themselves does any good. There was never any problem in XP.

I'm using an Aero theme, but I've tried a basic theme and tried chaning the window colours manually, but I can't solve the problem (and I rather like Aero anyway!)

At my age I'm really finding this a problem - how do I solve it?

Kind regards

John

I should have said that I tried using the procedure "How to change default fonts" in this forum but there seems no way of changing the window font colour. I'm going round in circles!

Applications like MS Word and Excel are fine.

Regards

John