I had my drive controller configured for IDE when I installed Windows 7. This didn't change when I upgraded to Windows 8.
I now need to enable AHCI, but doing so causes Windows to fail to start. It doesn't know how to automatically fix the problem.
I was able to use Regedit from the recovery area, in order to try using this fix that worked for Vista. That key is missing in Windows 8, however.
I read that the relevant key is now in
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\storahci. But my settings already match the changes they suggest making.
How can I get Windows to boot after enabling AHCI in the BIOS?