What is the AHCI function in the BIOS that causes the blue screen of the win7 computer?

Win 7 computer often encounters the crisis of blue screen. This point, we can't deny it. It is strange to blame. In IDE mode, the system is all normal, and there will be no blue screen of death, but only one switch to BIOS mode. The system will often have a blue screen, a crash, or simply can not start, in fact, the reason is not the hardware failure, but just because of the ahci function in the BIOS, want to avoid the similar problem of ghost win7 again, in fact, very Simple, below, I will tell you how to operate it by Xiaobian!
1. First, press win+r to open the running window of the computer, type regedit and click Enter, so you can open the registration of the computer. The table editor window is up.
2. In the left menu of the editor window, let's click to open HKEY_LOCAL_MACHINE\\SYSTEM\\ CurrentControlSet\\services\\msahci, so that we can find a <start” file in the right window. Double-click the file, and a window will pop up to edit the DWORD bit value.
3. In this window, we can see that the system defaults to another value before, no matter how many, we will change this value to 0. After the modification is completed, click OK to exit the setting window.
4. Next, after we restart the computer and turn on the system, we right click on the desktop computer icon, then select Properties - Device Manager, and uninstall all the devices in the IDE ATA/ATAPI controller.