Web pages/downloads stop, but other connections not affected!

[DiG]

Hi, got this problem
When I'm on the internet (via wireless) a web page or download will just stop, and won't start again unless I press stop then refresh. The weird bit is no other connections are affected, I can download stuff and open new pages fine!
Any ideas?
Thanks

 

[DiG]

I'm on XP MCE, fresh install, happens in internet explorer and firefox