Stupid internet connectivity bug #firstworldproblems

So I’ve been having an annoyingly stupid connectivity bug the last day or so, where when I click on a link my browser starts thinking to itself, then gives me an error message that the site ain’t available. Then, when I try again, up it pops. This happens intermittedly, even on pages I just visited and in both Opera and IE. It doesn’t matter whether I connect to my router through ethernet or WLAN, whether both are used or not and doesn’t seem to happen on my other, laptop computer running Vista (work made me use it, don’t judge me.) My own computer is running Windows 7/64 bits. For one glorious moment I thought it could perhaps be the fake LAN network Oracle VirtualBox needs to have internet access, but disabling that didn’t help either.

Any ideas?

(Windows 7 is decent enough as an operating system when everything works, but once something goes wrong it’s pulling teeth to find out what the fsck is going on. Everything is so locked down and hidden from the user’s view and gets in your way when you’re bug tracking.)