The internet on my laptop is randomly extremely slow on wifi. For instance, when I run a speed test, the download speed will be around 15 Mbps which is normal performance and a few minutes later will not even crack 1 mbp. No other computer on my network is as slow as this. I'm posting from my iPad because I can't even get to this site. I have an extra router from my ISP and I switched to that but nothing improved. I tried different browsers such as IE and Firefox and it's still slow. None of the browsers have any addons or toolbars. I ran a full scan on Window Defender and Malwarebytes and neither found anything. I have 4 GB of ram and one third of it is in use at any given time. I went to a Starbucks across the street from my house and got on their wifi but it still was very slow. My ISP suggested that my network card may be faulty but Toshiba says it's not because if it was, I'd be kicked off the internet entirely, which isn't the case and they won't fix it even though it's still under warranty.