In certain systems that dual boot Windows Vista and Windows XP, severe data corruption can occur if the Vista installation resides on a SATA device which is accessed from an XP install located on an IDE hard disk. The first hint is often chkdsk popping up when booting Vista and showing a very large number of errors. If left unchecked, this will eventually render the Vista drive non-bootable and produce an error complaining about winload.exe being corrupt.