Microsoft KB Archive/93166

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Secure PC May Prevent HIMEM.SYS from Loading

Article ID: 93166

Article Last Modified on 5/12/2003


  • Microsoft MS-DOS 5.0 Standard Edition
  • Microsoft MS-DOS 5.0a
  • Microsoft MS-DOS 6.0 Standard Edition
  • Microsoft MS-DOS 6.2 Standard Edition
  • Microsoft MS-DOS 6.21 Standard Edition
  • Microsoft MS-DOS 6.22 Standard Edition

This article was previously published under Q93166


If you try to load HIMEM.SYS onto a system that contains Secure PC by Hughes Data systems, HIMEM.SYS may be unable to load.


Secure PC sets up a secure area on the hard disk drive that contains the files loaded during startup. To load HIMEM.SYS or any other system file in the CONFIG.SYS file, the configuration update program from Secure PC must be run in order to transfer HIMEM.SYS or the system files to the secure area so that it can load.

To transfer HIMEM.SYS into the secure area, it is recommended that customers contact Hughes Data Systems.

Secure PC is manufactured by Hughes Data Systems, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.

Additional query words: 6.22 5.00 5.00a 6.00 6.20 3rdparty

Keywords: KB93166