Sounds like your zoom level is set too high.
How To reset browser level to 100% Windows 7
Press Ctrl-0. However, you may find that 100% does not leave enough fuzziness for Clear Type to interpolate with. So, I like to use 112%, e.g. by pressing Alt-x Z C 112. It may not be so important on W7 but in W8 it is essential at least on wide-screen LED monitors.
In Internet explorer you can use these shortcuts. Other browsers are similar.
CTRL +(plus) Zoom In
CTRL + (minus) Zoom Out
CTRL + mouse scroll wheel
Hope this helps,
John