* The Ifshlp.sys file is missing from the Windows folder.

* The Config.sys file contains a line pointing to a previous version of the Ifshlp.sys file.

* The Ifshlp.sys statement was deleted from the Config.sys

* The [Paths] section in the Msdos.sys file is incorrect.

* A Winboot.ini file is present in the root folder of the boot disk.
http://support.microsoft.com/support...-US&SD=gn&FR=0