Windows has the drivers. VIA has not had USB drivers since the days of Win ME. Go to Windows Update and have it scan for new hardware with the card installed.
Are there any yellow !'s in Device Manager? Could be a bad card.
1)GA990XA-UD3, Phenom II 970 ,8Gb DDR3 1866, EVGA GTX560Ti,500Gb SATA II , LG DVD, Win 7 Ultimate 64bit
2)AX78, Phenom 9600, 9800GTX, XP Pro SP3