Increase SATA Disk Drive Performance in Microsoft Vista.

You can squeeze a more performance out of your SATA hard disk drive by enabling write caching. The price though, is an increased risk for data loss/corruption should you experienced a power loss - this risk is less in a laptop because of its battery.
1. Click on the Start Button.
2. Type "Device Manager" and hit Enter.
3. Expand Disk Drives.
4. Right-click on your hard disk drive and select Properties.
5. On the Policies tab, check Enable Advanced Performance.
6. Click OK and close Device Manager.

Source:- http://vista-basic.blogspot.com/