Always get your drivers from the manufacturer of the device's chipset. In this case it'll be Advanced Micro Devices Inc.
Drivers from Windows Update (and the Update drivers selection in Device Manager) only provide drivers that different system manufacturer's have uploaded to Microsoft. So, you may get a driver that is several versions older than the one's available from the device chipset manufacturer.
Also, the last I heard, Windows Update was still pushing some Vista drivers for Windows 7. I have an Asus P6T board and have had BSOD when sleeping issues since I started trying to use sleep in Windows 7. I reported this to Microsoft and was advised to get Windows 7 storage drivers in order to prevent the BSOD's.
I'm unable to find any information on the storage drivers for your system - but it appears to have an Intel chipset - so you may be able to find the Intel Matrix Storage drivers for Windows 7 there.