Problem with Windows 8 Upload.

Hello! I just bought a Dell V14T-5470-A60 with Windows 8 running on it. For the first time, I am encountering an issue. I am unable to upload any files, either by Email, Dropbox or Facebook. In result, I could not download anything. The odd part is that, even though I am using the same Wi-Fi on other computers connected to the same network, my computer is the only one experiencing this kind of problem. Can someone help me on resolving this?
