How to open the AHCI mode of Windows 7

The motherboard of the computer says that it supports AHCI mode, but since I installed Windows 7, I did not enable the SATA AHCI mode of the motherboard. After installing the system, I enabled AHCI mode, which caused the Windows 7 to start blue screen. enter the system. Is there a way to enable AHCI mode without reinstalling the system?
A: This is because after you install Windows 7 as before, the AHCI driver has been disabled. You must enable the SATA driver before you can switch to AHCI mode. Before changing the SATA mode, you need to enable AHCI mode in the registry. To do this, open the Registry Editor (run regedit) and navigate to:
HKEY_LOCAL_MACHINESystemCurrentControlSetServicesMsahci
Double-click on the right side of "Start"; in the "Value data" box, type "ldquo;0”, then single Click "OK" and close the registry. At this point, you can restart the system and enable SATA AHCI mode in the BIOS. Win 7 will not be blue screen.