The region of your driver doesn't make any difference soft-ware wise, it'll just contain 'color' instead of 'colour' and whatnot.
So you say this problem happened after your re-installed, and started to use uTorrent. I doubt uTorrent is the real problem. Find a way to fully remove your nVidia drivers (Google that), then head to
www.nvidia.com and re-install the nVidia motherboard drivers and then the nVidia gfx-card driver. Also make sure you are running DirectX 9.0c.
If this doesn't help, I think your graphical card is faulty. Try it in another machine/try another card in your machine.
Jam it back in, in the dark.