Yay! I finally found out the problem, it was the video cord! Somehow, it projected the image to my monitor too huge and it wasn't capable/strong enough to bare with my PC (it came with a Windows ME 2000 Laptop) which was what my geek friend told me. So after searching in my large basement for 2 hours, I found the original one nice and clean and imported it. It does sound weird, but I got Aero, my old size and etc back. This also happened before when I was switching it the first time back in 2011', it was normal but now it changed.. now THANKS for all your help guys.