However, the subsequent migration requires a previous intervention in the registry, otherwise Windows will no longer start.
Step 1: Open the registry
Go to Registry> HKEY_LOCAL_MACHINE \ System \ CurrentCon trolSet \ Services \ Msahci.
Step 2: Change the DWORD value to
Double-clicking the Start entry opens the form for changing the DWORD value. Set this entry from 3 to 0 (zero). Quit Windows. Go to the BIOS and find the settings for the controller to which your SSD disk is connected.
Step 3: Select the Controller
If there are two onboard controllers on your motherboard, for example, if the chipset (Intel) does not support older IDE devices, but the motherboard manufacturer has installed such a 40-pin flat-ribbon connector, Where your SSD is connected.
Step 4: Activate AHCI
With this controller, you now enable AHCI. Save the changed BIOS settings (usually with F10) and exit the BIOS menu. The computer is now rebooting. Keep the Windows 7 installation DVD ready, as Windows will now install the AHCI driver.
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