Router acting wierd...browser highjacking or something like that

Hello all. Well here's what's happening. My mom has 3 laptops. One running Vista, one Windows 7, and one macbook running whatever. All three laptops have this like..browser highjacking I think is what it's called. When you click a link and it goes to an undesired page? Like I'll go too yahoo and search UFC and click on ufc.com and it'll go to apartmentfinder.com or some crazy thing like that. Now all three computers do this. Now here's the thing...they only do it at her house. When she takes her laptop to work, it doesn't do it there. I unplugged the router and ran the ethernet cable directly from the modem to the laptop and it doesn't do it, all the links work fine when you click them. So I'm thinking it has to be something wrong with the router, right? It's a Netgear Wireless G Router WGR614 V9. I've put multiple programs trying to fix the problem on the computer but nothing seemed to work. Ran adaware, malwarebyte's antimalware, glary utilities. Ran all of those and it's still having the problem. I'm thinking I'd just have to go into my router and change some setting or do a factory reset or something..I don't know. I'm not too tech savy when it comes to routers. So if anybody can help me...it'd be much appreciated.

Netgear Wireless G Router WGR614 V9
Laptops running Vista, Windows 7, and a macbook.