I believe many friends have encountered the situation that after installing Windows, if they turn on the AHCI function of the SATA hard disk in the BIOS, they will not be able to start. I recently encountered this problem when I turned on AHCI after installing Windows 7. Only after changing back to IDE mode did the system return to normal. After testing, I found that if the Windows system is installed in IDE mode, if you want to change the hard disk to AHCI mode in the BIOS, you need to reinstall the system. So is there any way to enable the AHCI mode of the hard disk without reinstalling the system? After some research and consultation, I finally found the following solution.
Turn on AHCI mode after modifying the registry
1. Click the "Start" button, type "regedit" in the search box, and press the Enter key to open the "Registry Editor" window. Although Windows 7 does not display the "Run" command in the "Start" menu by default, you can actually use the search box to replace this function (or directly press the Windows key + R key and enter).
2. In the title bar on the left side of the "Registry Editor" window, locate the HKEY_LOCAL_MACHINESYSTEMCurrentControlSetservicesmsahci branch, and then double-click "Start" in the right window.
3. In the "Edit DWORD Value" dialog box that opens, change the value in the "Value Data" box from 3 to the number 0, and click the "OK" button.
4. Close the "Registry Editor" window and restart your computer.
5. When restarting the computer, enter the BIOS setting interface and change the hard disk to AHCI mode. For example, for my computer, press the F1 key to enter the BIOS when starting the computer, select Devices→ATA Drives Setup→Configure SATA as→AHCI, and finally press the F10 key to save and exit the BIOS.
After modifying the registry and turning on the hard disk AHCI mode as described above, the system can start normally without reinstalling it. Although the startup speed of the computer will not change, you can see a certain acceleration effect when copying a large number of files.
summary:
Of course, there are a few things you need to pay attention to during specific operations.
Different motherboards have different shortcut keys to enter the BIOS and the location of the AHCI adjustment item in the BIOS. You can confirm by reading the user manual that comes with the motherboard.
Under normal circumstances, the IDE mode of the hard disk is enabled by default in the BIOS, and AHCI is the abbreviation of Advanced Host Controller Interface, which means advanced host controller interface. It is a technology led by Intel and can be improved to a certain extent. It is recommended to turn on the speed of SATA hard disk.
In Windows Vista SP1 and later versions of the system, after the BIOS changes the hard disk to AHCI mode, the system will automatically install the driver. But if you are using an operating system before Vista SP1, you need to manually load the AHCI driver from the Windows system installation CD when starting the computer. If there is no installation CD for the Windows system, please change back to IDE mode first, start the computer, download and install the AHCI driver, and then enter the BIOS to change the hard disk to AHCI mode.