check your bios settings.

Thanks - but it only worked until Windows is launched (all the boot screen are non-widescreen, but in windows, everything becomes widescreen again). I runned a game and it's still widescreen.

I noticed in the 'Intel Extreme Graphics 2 for mobile' Graphic Properties that there is an option 'Display Settings > Display Expeansion' with only one feature: 'Full Screen (No Border)'. I imagine there is a way to have more options in this panel such as 'not full screen with borders'. Any idea how it's possible or if it's even possible to do? I wish there was an additionnal bullet offering what I'm looking for!

Should I update the drivers of my video card or something?

Thanks

since there is only on driver date is 2005 you have the latest.

Even if I disable Video Expansion in Bios, Windows and any full screen softwares are still using the widescreen option (strechting the graphics).

I don't understand why Windows is using some sort of default settings instead of what specified in the bios.

Any idea?