Would a widescreen monitor cause that problem? No
Would the "Intel´┐Ż Media Graphics Accelerator" cause problems? No
Would a compatability option in the properties tab for the application of VX or the RGSS2 be needed? No
Let me think about it. Its related to the display adapter, I believe.
Even though you have a new computer, you should check your video card's manufacturer's site for any updates. Just in case.
Edit: Here's a couple options. I will do what I can, but this is primarily a pc issue, not VX in general. I do enough tech support in my professional life.
1. Make sure in the F1 settings, you check the Reduce Screen Flicker.
2. Head to manufacturer's site for updates to motherboard chipset, video card. If you have onboard video, they should be all on one site.
3. If your display adapter allows it, turn on hardware acceleration(or off, really depends on the situation).
4. Lower your resolution before running the game in full screen.
Good luck. May want to peruse Google as well. Might find your answer.