Not sure whats happened!

Hi,
I recently got a new laptop pc, with windows vista on it.
It was using my internet connection that is on my pc as the broadband internet modem is wireless, and all was working fine until yesterday.
I'm not sure if I'm infected with something, or not, but I can't access certain websites, well one that I have found so far, and its one that I need to be able to access.
I've tried restarting both computers, and tried leaving both off for a while, also tried turning off internet modem, and tried leaving it off too, I've done a DNS flush on my pc, but on the laptop it says it needs elevation so I'm not sure what to do.

Pc is XP, laptop is Vista.

I hope someone can help me get this sorted.

Thanks for taking the time to read this.

 

No inline hjt logs please.

 

Ok sorry, no problem!

 

http://forums.majorgeeks.com/forumdisplay.php?f=35

 

Ok, I've done most of that before posting here, the only things I haven't done is the ones I don't know how to do, and I've still got the problem.