Cannot login to certain websites in any browser

Hi, I recently bought a new Asus Laptop and am having difficulty login into some of my universities pages with the new computer (namely outlook web access and some library login pages). This happens regardless of connection type (LAN, WLAN and Mobile Broadband). I have reset IPCONFIG and other network settings and have disabled anti-virus software to no avail. So far, my universities website is the only one it is having difficulty with with other websites like facebook having no problems logging in. This happens regardless of browser also. In internet explorer, some of the images fail to load on the page (indicating the page won't fully load) and this is obviously followed by the fact that page says 'connection error' after clicking the login button and waiting around 30 seconds. It is also evident that this is not an issue on the university's side, with nobody else I know having experienced this problem.

Any help on this issues would be greatly appreciated.