SAS Window: Winlogon.exe Error

• Microsoft Windows NT Workstation version 4.0
• Microsoft Windows NT Server version 4.0

SYMPTOMS

When you start Windows NT and you log on, the following error message may appear:

   Error: SAS Window: Winlogon.exe
   There is no disk in the drive. Please insert a disk into drive A:

CAUSE

Systems that have bootable CD-ROMs and Award BIOS with a date code prior to September 25, 1996 may experience this problem. The Award BIOSes with release dates prior to September 25, 1996 enable bootable CD-ROM support by using floppy and hard disk emulation. Windows NT 4.0 does not support emulation mode CD-ROM booting.

RESOLUTION

Disable the bootable CD-ROM functionality of the system BIOS or of the SCSI controller BIOS.

To disable the bootable CD-ROM support of the Award BIOS:

1. Restart the system.

2. Press the DEL key to enter the BIOS Setup menu.

3. Move the cursor to BIOS Feature Setup and press the Enter Key.

4. Click BOOT Sequence.

5. Change the boot sequence so that the CD-ROM appears after the hard disk drive.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

The third-party products discussed here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.