AHCI open blue screen solution

After installing Win7 system, if you use IDE mode, everything is normal, after the AHCI mode is enabled in the BIOS, there will be a crash, blue screen, unable to start and other faults. Analysis of the cause: If the normal hardware failure in the IDE mode is very unlikely, the cause of the problem is generally caused by an abnormality in the WIN7 random AHCI driver match. Solution: 1. Locate the HKEY_LOCAL_MACHINE\\SYSTEM\\ CurrentControlSet\\services\\msahci branch in the title bar on the left side of the "Registry Editor" window, then double-click “Start” in the right window. 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---Property---Device Manager, as shown in the figure: 3. Uninstall all the devices in the IDE ATA/ATAPI controller, as shown in the figure: 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, as shown in the figure:

Generally the problem is mostly caused by installing Win7 system in IDE mode, after reading I hope to help you later in this article.