Default window size is incorrect

I recently did a clean install of Windows 7. I had run into an issue where certain UI elements would ignore DPI changes. Eventually, text looked like this:



Not exactly ideal. I couldn't find a solution, so I was forced to do reinstall. Instead of using my pre-SP1 disc, I created a slipstream DVD. Despite RT Se7en Lite giving me an error at the end of the burning process, Windows installed fine... for the most part. See, the default window size is too wide. Whereas windows typically default at something closer to 4:3, mine are closer to 16:9. It's a minor issue, sure, but I'm worried it's a symptom of a bigger problem.

Thinking something got goofed up during the install, I found and applied a registry edit that resets window properties. After relogging, the issue still persisted. Does SP1 use wider windows by default or is there something else going on?

Try looking at this:
DPI Display Size Settings - Change

Or you could try updating your Graphic Drivers.