Internet problem

[Angrist]

Sometimes when I'm surfing, Firefox and Internet Explorer don't work anymore. No traffic at all, sometimes this lasts for more than a minute. I mainly use FF and it happens to all sites, including Google. I tried copying the url into IE, but IE didn't load the page either (although the webmail page that was open still works).

In the meanwhile, MSN works. Skype works. I get no error messages.

Sometimes I experience sudden lag in Super Smash Bros. Brawl, sometimes so bad that it kicks me out of the game. Do you think that could be the same problem?

I use a wireless network. Any ideas what this can be? (I guess I'll try plugging in the LAN cable again.)