Upon booting Windows Vista or Windows 7/8.x/10 you receive one of the following error messages:
Windows failed to load because a required file is missing or corrupt
Where the file msrpc.sys is listed.
NLS is missing
These errors can have multiple causes, but one potential cause when an IDE drive is used is that the drive is a master drive, but is not connected to the end of the IDE cable. Another potential cause is that the drive jumpers are misconfigured.
Reorient the drive to the end of the cable, if needed, and/or correct the jumper configuration.