In had the same problem about a week ago. Unfortunately, I took the bull by the horns and reformatted my harddrive. When I reloaded, the problem was gone
I wish I could offer a solution, Callie's suggestion sounds like a posibility but personally, I think there is corruption in Internet explorer if you are having the same problem with overseas sites. I never had this problem on domestic sites, or the may be a bug ( virus/worm ) that's causing this problem.
Wish I could help more