Okay, this might take a minute to read, but I believe I have a solution.
I was playing maplestory (yes I play maplestory...) and normally I have black bars on the sides (when I don't it look like crap).
When I opened the game again this morning, it was stretched (I hadn't changed any options manually)
After about 3 hours of searching forums and such, I gave up looking and started figiting with options.
I found that when you change the screen resolution (normally not ingame) other scaling options come up that are not available in others ( I have been running 1920x1080 since I got this his laptop, it's a dell studio, but it has the same Graphics card).
I switched my res to 1280x1024, opened the advanced res options, clicked the Intel graphics tab on top ( above the other tabs) and the bottem option, scaling,
was set to Scale full screen ( I assume this is what your looking for) I hit the drop down and found maintain aspect ratio.
I got my picture back to the way it was. I'm pretty sure if you we're to go into this resolution ( or what ever your game runs in/something close to what your game runs in ) you could hit the Scale full screen option and get it to play your games with out black bars.
If you want the step-by-step
1. Go into your Resolution options. ( You'll want to know what res is native to your game )
2. When you have changed the res to what you need, Click advanced settings.
3. The top tab should say something like "Intel(R) Graphics and Media control panel", Click it.
4. Go to the scaling drop tab and select "Scale Full Screen" and Apply it.
5. Go back to your Resolution options and set the screen back to your preferred Resolution Settings ( mine Is 1920x1080 )
6. Test your game to see if it worked.
I hope this helps, it worked for me.
all you have to do, is from the desktop, change your computers resolution to 1024x768. Then right click the desktop again, graphics options, panel fit, and select scale full screen.
When you do this, the 1024x768 resolution will have boxes on the left and right. That is how you know you got it right. You then change your resolution back to it's recommended setting, and the boxes go away. After that, when you play a video game, it will be full screen.
Works for me like a charm