Microsoft KB Archive/238860

= Uninterruptible Power Supply Goes into Battery Mode During Windows 2000 Installation =

Article ID: 238860

Article Last Modified on 3/1/2007

-

APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition

-



This article was previously published under Q238860



SYMPTOMS
When you install Windows 2000 on a computer that has an uninterruptible power supply (UPS) attached, the computer may go into Battery mode.



CAUSE
This behavior occurs during Setup when the serial enumeration driver (Serunum.sys) attempts to detect what exists on the serial ports. The UPS is started when the driver touches the serial port.



RESOLUTION
To work around this problem, disconnect the serial cable from the UPS during Setup. The problem does not occur after Setup is finished.



STATUS
Microsoft has confirmed that this is a problem in Microsoft Windows 2000.

Keywords: kbhardware kbprb KB238860

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.