This PowerToy lets you use ClearType technology to make it easier to read text on your screen, and installs in the Control Panel for easy access. Get it here This program is only for Win XP
What is ClearType technology you ask?
ClearType is a software technology developed by Microsoft that improves the readability of text on existing LCDs (Liquid Crystal Displays), such as laptop screens, Pocket PC screens and flat panel monitors. With ClearType font technology, the words on your computer screen look almost as sharp and clear as those printed on a piece of paper.
ClearType works by accessing the individual vertical color stripe elements in every pixel of an LCD screen. Before ClearType, the smallest level of detail that a computer could display was a single pixel, but with ClearType running on an LCD monitor, we can now display features of text as small as a fraction of a pixel in width. The extra resolution increases the sharpness of the tiny details in text display, making it much easier to read over long durations. (from Microsoft)
After you install it you can access it from the Control Panel > Appearance & Themes > Clear Type Tuning. Put a check mark in Turn on Clear Type. Then click start Wizard
Click on the text that looks best to you, then click next.
Again choose the one that looks best, then click next.
If you like how the text looks click finish, or click back to make any changes.