Win7 system AHCI open blue screen how to do

After installing Win7 system, if you use IDE mode, everything is normal, after the AHCI mode is turned on in the BIOS, there is a crash, blue screen, unable to start and other faults.
Cause analysis: If the normal hardware failure in the IDE mode is very unlikely, the cause of the problem is generally caused by an abnormality when the WIN7 random AHCI driver matches.
Workaround:
1. In the "Registry Editor" window title bar to the HKEY_LOCAL_MACHINESYSTEM CurrentControlSetservicesmsahci branch, then in the right window, double-click "Start". In the "Edit DWORD Value" dialog box that opens, change the value in the "Value data" box from 3 to 0.
2. Restart the system desktop, click the computer right---Properties---Device Manager;
3. Uninstall all the devices in the IDE ATA/ATAPI controller;
When the restart option appears, click No .
4. If there is an option that cannot be deleted, it can be ignored.
5. Restart and modify to AHCI mode in the BIOS, and enter the system normally.
6.Win7 system automatically loads AHCI driver after everything is normal;