I have the same problem. It was referring to Kernal_DATA_INPAGE_ERROR, then also referencing atapi.sys error.

Now the hard drive won't boot up at all. I've tried fdisk (4), chkdsk, scandsk, I've even used a couple of disk recovery tools (SpinRite v6, and GetMyDataBack NTFS v2.03) with NO success.

The computer still boots with No Operating System.

wb