what resolution is your monitor set to, and what is the 'native resolution' of the monitor? Let's say the monitor (presumably, the laptop lcd screen) is advertized as 1200x1024, and let's say your eyesight is not that good and you changed it to 800x600 ... you will see a fuzzy display because the LCD monitors only display crisp at their 'native' resolution.
For this reason, I go out of my way to buy laptops with XVGA, not SXVGA - that is, with 1024x768, and not the more expensive ones with 1200x or 1400x - because at their native resolution, which is crisp, I can't read them!
If that's not the case, have you set a custom dpi? changing dpi from the default (96, I think) will do similar.