whenever i am downloading anything at broadband speeds as low as 100-200 kB/s, my computer is basically locked up and the second green light (write indicator) is mostly stuck on. so if i am downloading, my computer is pretty much useless. what do i need to do to have a functional computer that can download files without locking up? should i try getting a usb flash drive to download to instead? or do i need more RAM? (have 512mb standard)