I needed some help with my internet browser - I tried upgrading to IE7 last week, and when I did that, I lost access to some websites - but not all. When I type the URL into the address bar, it just continually tries to load the page with no success. This only happens on some websites - like Zulm (I'm typing this message from work) and Facebook - but others, like Telegraph India and Hotmail seem to work ok. I uninstalled IE7, and went back to IE6, but this didn't help things. I've installed Firefox and Opera, and have the same problem with both these browsers as well. I thought it might be my ISP, but when I use the wireless connection on my laptop, it seems to work ok.

I've scanned the computer for viruses and spyware and come up with nothing. Any ideas?