Hi, The motherboard on my computer has two inbuilt USB 1.1 ports. It has a USB2 PCI Card on it. When I try to burn DVDs, the buffer level fluctuates wildly, and sometimes the process freezes up. I have Nero 18.104.22.168 and an ATAPI DVD DD 2x16x4x16 USB DVD writer. Any help would be appreciated. Thanks, Suresh.