I have a Sony Vaio PCV-RS520 and it comes standard with 8 USB 2.0 ports. I bought a Western Digital My Book Essential Edition 1 TB around november 2008 and it worked great including transfer speed. i recently reboot my PC to manufacture status and upgrade back to Microsoft SP3 and now my External HDD transfer rate it slow from all 8 ports. When i connect the USB im now getting a message that "This USB device can perform faster if you connect it to a High Speed USB 2.0 Port". #1. The device MGR shows no ENHANCED controllers. I have uninstalled and reinstalled them, to no avail. #2. I have checked the BIOS settings and any mention of USB is NON EXISTENT. #3. I have tried to update the drivers but, have no windows XP disc but, DO have the Sony recovery DVD and dont know if I can pull a driver from it? EDIT: the External HDD work on other PC.