Check the steps from Tony Schreiner in his blog:
By default Boot Camp will configure Windows to use 144 DPI. This is a
good default because it strikes a balance between making UI elements
large enough to be usable, while still staying within the “supported”
realm of mainstream Windows software. By this, what I mean is that up
until recently (at least at Microsoft) it was a given to make sure
applications worked well at 125% and 150% DPI scaling, but 200%
scaling has been less tested and is also less likely to have icons and
other art that natively scales to that setting.
For reasonably advanced users I recommend enabling “Use Windows XP
style scaling” under the “Custom sizing options”. This prevents the OS
from using the DWM to use bitmap stretching on the application to make
everything bigger at the expense of quality.
For Internet Explorer 10 I bump the zoom factor to 200% (192 DPI) for
most casual web surfing. This gives a very comfortable text size while
eliminating wasted space. Text is incredibly sharp, well-defined, and
readable. There is no longer any concern over respecting the font vs.
respecting the pixel grid. Images look blurry in comparison, but
unlike at ~120 DPI it’s an acceptable trade-off, and they don’t look
worse than they would if I were running at a lower resolution.