Microsoft KB Archive/103011

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STOP Message: Unknown Hard Error with DLC.SYS


The information in this article applies to:

  • Microsoft Windows NT Server version 3.1
  • Microsoft Windows NT Workstation version 3.1
  • Microsoft Windows NT Advanced Server, version 3.1


If a beta version of Microsoft SNA Server for Windows NT is installed, the following STOP message may appear on startup:

STOP: c0000221 Unknown Hard Error


The April beta version of SNA Server contained DLC patches as a workaround for a beta Windows NT bug. The patched DLC.SYS file for beta Windows NT causes the released Windows NT version to stop responding when you start a DLC session.


If the system partition is FAT and on an Intel platform, boot to MS-DOS and expand a new copy of DLC.SYS off the released Windows NT CD-ROM or floppy disks.

The new copy of DLC.SYS should be expanded from the CD-ROM or floppy disk and placed in the winnt\system32\drivers subdirectory on the BOOT drive.

If the System partition is not FAT, Windows NT must be reinstalled.

Additional query words: prodnt prodsna DLC crash hang blue trap

Keywords : kbother
Issue type : kbprb
Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW310 kbWinNTSsearch kbWinNTS310 kbWinNTAdvSerSearch kbWinNTAdvServ310 kbWinNTS310xsearch kbWinNT310xSearch kbWinNTW310Search

Last Reviewed: October 27, 2000
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