Apparently there is a huge problem with font rendering in Windows 8. Text appears very blurry. Programs affected by the new rendering are: Internet Explorer 10, the modern interface (start screen), Office 2013 and other 3rd party applications that rely on this rendering technology. There is no way to fix this problem, unless Microsoft recognizes it.
I 've gathered links bellow that refer to the same problem to highlight its importance and display the number of users that are affected:
and there are lots of more...