The methods which shared in this article

How to set AHCI to speed up Windows 7

And as previously used Windows XP, many users are trying to improve Windows 7 system's running swift. And the most common approach is to optimize the system services, remove some non-essential system services and optimize the resource management Menu and so on. In addition, there are some "unusual remedies" which can improve Windows 7's speed as twice.
If you want to try the approach which shared by this article and make your Windows 7 run fast. First of all, you should make sure whether your motherboard supports AHCI.

If your motherboard supports AHCI, please enter into the Bios settings before you install Windows 7. And then adjust the IDE to AHCI which default by SATA controller Mode in Advanced Option.
And please note that different Bios motherboard may be different. Then please find the corresponding items when you setting.

The methods which shared in this article are drop from the number of users. According to feedback from users themselves, it can can increase the speed of Windows 7's operating system in actual use. However, I did not do more testing. When you using this method, please identify by yourself.